May 13, 2016, 03:18 PM
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"Weight Reduction List" Fully Updated!
About 2/3's of a tank maybe less and me standing next to the scale. Maybe our scale is way off, I'm not sure the last time it has been calibrated. My brothers Iron headed BBC Malibu wagon was only 3700ish when he weighed it a few years ago on a new set of scales at his work.
Hmm ok, well that makes me feel a little better. After reading through this post and doing some mental math I felt I was going to be lighter. I'll see if I can come across some other scales.
TECH Veteran
Joined: Sep 2014
Posts: 4,891
Likes: 702
From: Mississippi
Is your Z28 factory cloth, leather or a Hardtop instead of T-top car ?
TECH Resident
Joined: Oct 2014
Posts: 898
Likes: 71
Here’s the details:
T-top car, cloth interior. A4. At the time of that weigh in this is what I had done:
remove speakers
removed radio and put just the faceplate in
removed all heat shields under the car
Kokks headers and duals
Full bmr suspension in rear
S60 with wilwoods kept parking brake
bmr trans mount with torque arm relocation
draglite wheels with skinny fronts
bmr control arms up fromt with wilwoods
remove front sway bar
slp cold air package
Everything was still in place. Hvac, power steering, factory k member, power windows, keyless entry. Basically except for the speakers and radio, the only weight reduction done to this point was replacing factory parts with aftermarket parts. The heat shielding had to come off to fit the Kooks system.
Kinda....ive actually did some whole reduction 
Tube k and tube front bumper support is on the car now.
Hard to get much weight out of making holes....especially in sheet metal. But they are a great distraction from where the real weight was removed. Sheet metal holes should really be flared to maintain strength.
Tube k and tube front bumper support is on the car now.
Hard to get much weight out of making holes....especially in sheet metal. But they are a great distraction from where the real weight was removed. Sheet metal holes should really be flared to maintain strength.
Kinda....ive actually did some whole reduction
Tube k and tube front bumper support is on the car now.
Hard to get much weight out of making holes....especially in sheet metal. But they are a great distraction from where the real weight was removed. Sheet metal holes should really be flared to maintain strength.
Tube k and tube front bumper support is on the car now.
Hard to get much weight out of making holes....especially in sheet metal. But they are a great distraction from where the real weight was removed. Sheet metal holes should really be flared to maintain strength.
Half the battle is not adding stupid **** to a car.
There's nothing really hidden on my car. People just look at the wrong place.....like the holes. Then they cry about a few holes in a bracket which basically doesn't do **** in the grand scheme of things. They so worried about that they overlook where the real weight reduction is and it's as obvious as the holes. They just don't know wtf they're looking at. It's the flanges. Way more weight in reducing the flanging vs those pissy *** holes.
My kmember you brought up for example.....they weigh like 54lb stock if i remember right. Everyone see's the holes. Only about 5lb came from the holes while the other 18 or so lb came from the cutting the flanging/excess off and welding it solid. I even reinforced some places on it.
There's nothing really hidden on my car. People just look at the wrong place.....like the holes. Then they cry about a few holes in a bracket which basically doesn't do **** in the grand scheme of things. They so worried about that they overlook where the real weight reduction is and it's as obvious as the holes. They just don't know wtf they're looking at. It's the flanges. Way more weight in reducing the flanging vs those pissy *** holes.
My kmember you brought up for example.....they weigh like 54lb stock if i remember right. Everyone see's the holes. Only about 5lb came from the holes while the other 18 or so lb came from the cutting the flanging/excess off and welding it solid. I even reinforced some places on it.
On The Tree
Joined: Oct 2015
Posts: 142
Likes: 1
From: Memphis
Consolidated all 22 pages from previous "Weight Reduction" list. Please post with weight facts/figures as you get them. Thanks to all! Enjoy! Now go get the car on that diet and let's go racin'!!
Free stuff
12..ABS module
15..AC compressor
8.6.AC condenser
21..AC fan motor (entire assembly)
14..Airbag and bracket, passenger's
4...Airbag, driver's
.....Air dam
1...Air filter
6...Air Pump (w/brass fittings)
14..Alternator w/ bracket
3...Amp, Monsoon
3...Antenna, bracket, and motor if applicable
1...Ashtray & lighter
.....Blinker switch
2...Bolt lengths, extra
.....Brake pedal pad
16..Brakes, stock w/ caliper, bracket, pads
22..Bumper, front reinforcement and brackets
21..Bumper, rear reinforcement and brackets
41..Carpet & Sound deadening
50..Catback
15..Cats
8...CD Changer (stock)
10..Center console
.....Coating, under carpet
5...Coolant Overflow
4...Crossmember brace
7...Cruise control (w/cable, throttle cable cover, bracket)
11..Dash
6...Dash brace (steel)
5...Dash Pad
4...Dash Replacement
18..Door panel (TA, both)
5...Door panel (psgr)
1...Door panel insulation
15..EGR, air pump, & harware
.....Emblems
14..Fan (dual)
9...Fan (single)
.....Fan shroud
5...Fenders (Inner metal)
7...Firewall Insulation
13..Firewall Insulation w/ plastic
5...Floormats
3...Foglights and brackets
.....FRA mod
7...Gas, Extra (per pound)
23..Gas Tank (steel)
20..Gas Tank (plastic)
5...Gas Tank Evac Box
2...Glovebox
1...Grill insert
50..Hatch (w/ no glass)
60..Hatch (TA w/ high-rise spoiler)
40..Hatch (Firebird w/ molded spoiler)
4...Hatch cover
2...Hatch shocks
20..Headlights/metal frames
2...Headliner
4.4.Head unit (Monsoon)
.....Head unit/AC console trim piece
8...Heat sheilding
9...Heater core (w/water)
8...Hood Latch w/ brackets
1...Hood shocks
3...Horn
45..HVAC, complete system
3...Inner fenderwells, plastic
2...Intake Silencer
.....License plate brackets
2...License plate(s)
1...Lug Nuts (Chrome)
1...MAF
13e.Manifolds (stock)
4...Mirror/bracket
.....Misc. junk in the car like keys, garage remote, change, etc.
4...Overflow Tank
1...Owner's manual
3...Panels, under steering wheel
17..Panhard rod (TRZ kit)
5...Panhard rod brace, upper
.....Parking brake
.....Power brake booster
5...Parking brake handle
.....Power seat motor
3...Power steering cooler
12..Power steering pump, pulley, idler pulley
.....Power window motors
17...Radio (stock in center panel)
1...Rear view mirror
9...Seatbelts (rears and passenger's)
7...Seatbelt (front only)
37..Seat, driver's (cloth)
46..Seat, front (Trans Am leather)
31..Seat, front (Camaro leather)
30..Seat, passenger's (cloth)
41..Seat, passenger (Trans Am leather w/ lumbar pump)
28..Seats, rear (leather)
4...Seat mounts and brackets (rear)
3...Sheetmetal, extra double walled
1...Shifter ****
20..Side impact bars (doors)
37..Spare tire and jack
6...Speaker panels, hatch
5...Speaker panels, rear passenger's
15..Speakers
5...Speakers (mid-base Monsoon, pair)
5...Speakers (Alpine, pair)
18..Spoiler (Weight measured on a Pontiac)
.....Spring isolators
2...Sun visors
14..Swaybar and brackets, front
1...Swaybar metal attachment
.....Taillight(s)
12..T-Tops
2...T-Top holders
11..T-Top hump/sheet metal
3...TCS motor
.....Under car tow points
1...Washer fluid pump
9...Window motor/track
8...Windshield washer fluid
3...Windshield wiper reservoir
4...Wiper arms
10..Wipers/motor
.....Wiring, Excess
21..Y-Pipe (w/1 cat.)
2...Y-Pipe hanger (stock, connected to tailshaft)
Wallet mods
10e.A-Arms (BMR mild steel)
13e.A-Arms (stock)
3...Airlid, aftermarket
19..Alternator relocation kit (LT1, PS removal, Speed Inc.)
104.Aluminum Block (main caps, bolts)
33..Battery (Optima yellow top)
14..Battery (Odyssey PC680 dry cell)
40..Battery relocation (rear)
8...Brakes, Aerospace w/ caliper, pads
13..Carpet (Speed Inc., lightweight)
38..Catback system (Hooker)
3...Chromoly LCAs
3/9.Carbon fiber driveshaft
14..Chromoly A-arms
25..Chromoly K-member
23..Cylinder head (unassembled)
30..Door (no internals)
14..Door glass
34..Draglite wheels (15X10 w/tires no tubes)
.....Drag slicks or street slicks
.....Drilled axles
13..Driveshaft (aluminum)
17..Dry cell battery (stock location)
7...Electric water pump
7...Emergency brake items (handle/cables)
21..Exhaust (TD's dumped before axle)
37..Exhaust (TSP TD's w/ mufflers)
......Fiberglass door skins
35..Fiberglass hood
.....Fuel cell
18..Fuel tank (98-99) plastic
50..Hatch (rear) with no glass
25..Headers, Kooks 1 7/8
5...Header extensions (12" open headers)
52..Hood ('98-02 LS1 stock steel)
51..Hood ('00 SS)
45..Hood (stock LT1 SS)
23..Hood (Chaser carbon, no brackets)
15..Hood (VFN Sunoco pin-on)
13..Hood (Harwood 3" cowl)
10..Intake (LS1)
11..Intake (FAST 78)
25..Intake (BBK 85)
55..K-Member (Stock LS1 w/clamshell's & inserts)
20..K-Member (LT1 PA racing)
25..K-Member (BMR)
75..Lexan glass (Percy's speedglass FR, RR, & side windows)
30?.Lexan glass (rear window only)
.....Lightweight clothing
35..Lightweight brakes, front
48..Lightweight brakes, Strange front (w/spindle cutaway)
32...Lightweight brakes, rear
10..Lightweight flywheel
15..Lightweight springs and shocks (BMR)
.....Lightweight steering column
9...Lightweight steering wheel
6...Lower control arms
10..Manual rack and pinion steering
10..Manual Window
35..Mini-Tubbing
23..Muffler (SLP w/ tailpipes/tips)
5...Panhard Rod Brace/bar
.....Plastic fuel tank, late model
.....Powerglide, TH350, or M4 transmission
15..Racing seat
150.Rear-End (10-bolt, no fluid)
196.Rear-End (S60, dry, true trac)
74..Rear-End (Moser M9 housing)
40..Rear-End (Moser thru-bolt center section spool)
+64.Roll-Bar (8 pt chromoly)
+52.Roll-Bar (6 pt chromoly)
+67.Roll-Bar (6 pt mild steel)
10..Rotor, drilled/slotted
5....Rotor, single disk race w/ alum. hub
18..Seat (Kirkey 17" prostreet/drag w/ cover)
6...Seatbelt (RJS 5-pt harness, camlock)
15..Shocks (front Hal's/QA1)
.....Shortbelt mod
17e.Skinny front tires
25..Slicks (rear 275s)
12..Spindle (front)
41..Spindle w/ ABS hub (both for 93-02)
28..Spindle (Racecraft w/ hub both)
14..Spool (Strange)
11..Springs (stock WS6 rear)
35p.Springs / Shocks (front only)
12..Springs (Afco front 14" 275)
16..Springs (BMR lowering)
34..Springs (Eibach drag-launch, 4 w/ airbags)
18..Subrame Connectors (2)
17e.Tires (165/85/15 radial)
9ea.Tires (Moroso 17050)
12ozTires (MT 26/4.5 ET fronts)
19e.Tires (M&H Racemaster P185/75R15 fronts)
17..Torque Arm (stock M6)
21..Torque Arm (BMR full length adj)
20..TQ converter, small
.....Underdrive pulleys
12e.Wheels (Alumistar 15X10)
10..Wheels (Draglites)
8...Wheels (Bogart front)
10..Wheels (Bogart rear)
26e.Wheels (Greg Weld 15/3.5, 165/80/15 tire)
31p.Wheels (Weld RT-S 15X4 w/ MT 26" tire)
42e.Wheels (Weld Prostars, 28/10.5 tire)
56e.Wheels (Z06 17X9, 275 tire)
54e.Wheels (Z06 18X10.5, 305/35 Nitto)
48e.Wheels (Z06 Replica, 275/40/17 tire)
46e.Wheels (ZR1s, 26/11.5 ET streets)
9...Y-Pipe, off-road
Free stuff
12..ABS module
15..AC compressor
8.6.AC condenser
21..AC fan motor (entire assembly)
14..Airbag and bracket, passenger's
4...Airbag, driver's
.....Air dam
1...Air filter
6...Air Pump (w/brass fittings)
14..Alternator w/ bracket
3...Amp, Monsoon
3...Antenna, bracket, and motor if applicable
1...Ashtray & lighter
.....Blinker switch
2...Bolt lengths, extra
.....Brake pedal pad
16..Brakes, stock w/ caliper, bracket, pads
22..Bumper, front reinforcement and brackets
21..Bumper, rear reinforcement and brackets
41..Carpet & Sound deadening
50..Catback
15..Cats
8...CD Changer (stock)
10..Center console
.....Coating, under carpet
5...Coolant Overflow
4...Crossmember brace
7...Cruise control (w/cable, throttle cable cover, bracket)
11..Dash
6...Dash brace (steel)
5...Dash Pad
4...Dash Replacement
18..Door panel (TA, both)
5...Door panel (psgr)
1...Door panel insulation
15..EGR, air pump, & harware
.....Emblems
14..Fan (dual)
9...Fan (single)
.....Fan shroud
5...Fenders (Inner metal)
7...Firewall Insulation
13..Firewall Insulation w/ plastic
5...Floormats
3...Foglights and brackets
.....FRA mod
7...Gas, Extra (per pound)
23..Gas Tank (steel)
20..Gas Tank (plastic)
5...Gas Tank Evac Box
2...Glovebox
1...Grill insert
50..Hatch (w/ no glass)
60..Hatch (TA w/ high-rise spoiler)
40..Hatch (Firebird w/ molded spoiler)
4...Hatch cover
2...Hatch shocks
20..Headlights/metal frames
2...Headliner
4.4.Head unit (Monsoon)
.....Head unit/AC console trim piece
8...Heat sheilding
9...Heater core (w/water)
8...Hood Latch w/ brackets
1...Hood shocks
3...Horn
45..HVAC, complete system
3...Inner fenderwells, plastic
2...Intake Silencer
.....License plate brackets
2...License plate(s)
1...Lug Nuts (Chrome)
1...MAF
13e.Manifolds (stock)
4...Mirror/bracket
.....Misc. junk in the car like keys, garage remote, change, etc.
4...Overflow Tank
1...Owner's manual
3...Panels, under steering wheel
17..Panhard rod (TRZ kit)
5...Panhard rod brace, upper
.....Parking brake
.....Power brake booster
5...Parking brake handle
.....Power seat motor
3...Power steering cooler
12..Power steering pump, pulley, idler pulley
.....Power window motors
17...Radio (stock in center panel)
1...Rear view mirror
9...Seatbelts (rears and passenger's)
7...Seatbelt (front only)
37..Seat, driver's (cloth)
46..Seat, front (Trans Am leather)
31..Seat, front (Camaro leather)
30..Seat, passenger's (cloth)
41..Seat, passenger (Trans Am leather w/ lumbar pump)
28..Seats, rear (leather)
4...Seat mounts and brackets (rear)
3...Sheetmetal, extra double walled
1...Shifter ****
20..Side impact bars (doors)
37..Spare tire and jack
6...Speaker panels, hatch
5...Speaker panels, rear passenger's
15..Speakers
5...Speakers (mid-base Monsoon, pair)
5...Speakers (Alpine, pair)
18..Spoiler (Weight measured on a Pontiac)
.....Spring isolators
2...Sun visors
14..Swaybar and brackets, front
1...Swaybar metal attachment
.....Taillight(s)
12..T-Tops
2...T-Top holders
11..T-Top hump/sheet metal
3...TCS motor
.....Under car tow points
1...Washer fluid pump
9...Window motor/track
8...Windshield washer fluid
3...Windshield wiper reservoir
4...Wiper arms
10..Wipers/motor
.....Wiring, Excess
21..Y-Pipe (w/1 cat.)
2...Y-Pipe hanger (stock, connected to tailshaft)
Wallet mods
10e.A-Arms (BMR mild steel)
13e.A-Arms (stock)
3...Airlid, aftermarket
19..Alternator relocation kit (LT1, PS removal, Speed Inc.)
104.Aluminum Block (main caps, bolts)
33..Battery (Optima yellow top)
14..Battery (Odyssey PC680 dry cell)
40..Battery relocation (rear)
8...Brakes, Aerospace w/ caliper, pads
13..Carpet (Speed Inc., lightweight)
38..Catback system (Hooker)
3...Chromoly LCAs
3/9.Carbon fiber driveshaft
14..Chromoly A-arms
25..Chromoly K-member
23..Cylinder head (unassembled)
30..Door (no internals)
14..Door glass
34..Draglite wheels (15X10 w/tires no tubes)
.....Drag slicks or street slicks
.....Drilled axles
13..Driveshaft (aluminum)
17..Dry cell battery (stock location)
7...Electric water pump
7...Emergency brake items (handle/cables)
21..Exhaust (TD's dumped before axle)
37..Exhaust (TSP TD's w/ mufflers)
......Fiberglass door skins
35..Fiberglass hood
.....Fuel cell
18..Fuel tank (98-99) plastic
50..Hatch (rear) with no glass
25..Headers, Kooks 1 7/8
5...Header extensions (12" open headers)
52..Hood ('98-02 LS1 stock steel)
51..Hood ('00 SS)
45..Hood (stock LT1 SS)
23..Hood (Chaser carbon, no brackets)
15..Hood (VFN Sunoco pin-on)
13..Hood (Harwood 3" cowl)
10..Intake (LS1)
11..Intake (FAST 78)
25..Intake (BBK 85)
55..K-Member (Stock LS1 w/clamshell's & inserts)
20..K-Member (LT1 PA racing)
25..K-Member (BMR)
75..Lexan glass (Percy's speedglass FR, RR, & side windows)
30?.Lexan glass (rear window only)
.....Lightweight clothing
35..Lightweight brakes, front
48..Lightweight brakes, Strange front (w/spindle cutaway)
32...Lightweight brakes, rear
10..Lightweight flywheel
15..Lightweight springs and shocks (BMR)
.....Lightweight steering column
9...Lightweight steering wheel
6...Lower control arms
10..Manual rack and pinion steering
10..Manual Window
35..Mini-Tubbing
23..Muffler (SLP w/ tailpipes/tips)
5...Panhard Rod Brace/bar
.....Plastic fuel tank, late model
.....Powerglide, TH350, or M4 transmission
15..Racing seat
150.Rear-End (10-bolt, no fluid)
196.Rear-End (S60, dry, true trac)
74..Rear-End (Moser M9 housing)
40..Rear-End (Moser thru-bolt center section spool)
+64.Roll-Bar (8 pt chromoly)
+52.Roll-Bar (6 pt chromoly)
+67.Roll-Bar (6 pt mild steel)
10..Rotor, drilled/slotted
5....Rotor, single disk race w/ alum. hub
18..Seat (Kirkey 17" prostreet/drag w/ cover)
6...Seatbelt (RJS 5-pt harness, camlock)
15..Shocks (front Hal's/QA1)
.....Shortbelt mod
17e.Skinny front tires
25..Slicks (rear 275s)
12..Spindle (front)
41..Spindle w/ ABS hub (both for 93-02)
28..Spindle (Racecraft w/ hub both)
14..Spool (Strange)
11..Springs (stock WS6 rear)
35p.Springs / Shocks (front only)
12..Springs (Afco front 14" 275)
16..Springs (BMR lowering)
34..Springs (Eibach drag-launch, 4 w/ airbags)
18..Subrame Connectors (2)
17e.Tires (165/85/15 radial)
9ea.Tires (Moroso 17050)
12ozTires (MT 26/4.5 ET fronts)
19e.Tires (M&H Racemaster P185/75R15 fronts)
17..Torque Arm (stock M6)
21..Torque Arm (BMR full length adj)
20..TQ converter, small
.....Underdrive pulleys
12e.Wheels (Alumistar 15X10)
10..Wheels (Draglites)
8...Wheels (Bogart front)
10..Wheels (Bogart rear)
26e.Wheels (Greg Weld 15/3.5, 165/80/15 tire)
31p.Wheels (Weld RT-S 15X4 w/ MT 26" tire)
42e.Wheels (Weld Prostars, 28/10.5 tire)
56e.Wheels (Z06 17X9, 275 tire)
54e.Wheels (Z06 18X10.5, 305/35 Nitto)
48e.Wheels (Z06 Replica, 275/40/17 tire)
46e.Wheels (ZR1s, 26/11.5 ET streets)
9...Y-Pipe, off-road
What is total weight lossed with all the bought stuff?
I do think it would be neat if someone created a database program where you could plug in variables. For example all UMI aftermarket suspension vs Stock. I copied this example from something I saw: I did a search. OEM MAHLE cast LS1 piston weighs 434 grams. All the forged pistons I found are lighter than the OEM cast piston. So far the JE forged piston part # 194884 is the closest to OEM weight, but is still lighter @430 grams. The new Ross forging part #99838 is claimed to be designed for nitrous use, but Ross did not list the weight on their web site. The program would have a "calculate weight" button to estimate, and a "actual weight" tab input if you weigh the car. Sometimes my wording isn't the best, make sense?
weight reduction I also thought this was a good write up https://ls1tech.com/forums/suspensio...nceptions.html
Registered User
Joined: Feb 2026
Posts: 1
Likes: 0
I do think it would be neat if someone created a database program where you could plug in variables. For example all UMI aftermarket suspension vs Stock. I copied this example from something I saw: I did a search. OEM MAHLE cast LS1 piston weighs 434 grams. All the forged pistons I found are lighter than the OEM cast piston. So far the JE forged piston part # 194884 is the closest to OEM weight, but is still lighter @430 grams. The new Ross forging part #99838 is claimed to be designed for nitrous use, but Ross did not list the weight on their web site. The program would have a "calculate weight" button to estimate, and a "actual weight" tab input if you weigh the car. Sometimes my wording isn't the best, make sense?A discussion on The Fedora Lounge dives into the lesser-known Filson Black Label items reportedly produced by Manifattura Ceccarelli, sparking interest among heritage clothing enthusiasts. Members point out that this collaboration isn’t widely documented and seems to date back to the late 2000s or early 2010s, making it something of a mystery within Filson’s lineup. Several posters note that Manifattura Ceccarelli has since built a strong reputation for Italian-made outerwear using traditional materials and construction methods. The thread reflects how deeply collectors care about origin stories, craftsmanship, and authenticity when unusual labels or tags surface. Outside of detailed gear discussions like this, staying consistent with personal routines can be just as important - tools like https://wellness-app.cоm/ or an intermittent fasting app help users manage health goals alongside their everyday interests.
Last edited by alisonnystrom; Feb 12, 2026 at 02:28 AM.
