I don't know if it's already been mentioned but I took my two magnaflow mufflers off yesterday and realized they weigh probably about 40lbs EACH!

I don't know what kind of muffs you got but if they aren't bullet type I would bet that they weigh a ton!

On the flip side I ordered to replacement mufflers that are being shipped by UPS and by their calculations the total weight is 11 lbs WITH packing/shipping supples, so I figure 4.5-5 lbs per muffler.

In short, if you want to take off 60-70 lbs, spend 100 bucks and get light weight aftermarket mufflers.

 

Heres a good start...

All these things I just weighed (bathroom scale, +/- 1.5 lbs):

Skid plate: 18 lbs.
(BMR Skid Plate: 5 lbs)

Back seats (both pieces): 45 lbs.

Front Passenger seat (with bracket): 65 lbs.

Fuel Tank Brace: 25 lbs.
Fuel tank brakets/bolts(both): 12lbs(thanks PitchBlackGTO)

V-Brace for towing: 15 lbs.

Strut brace: 3lbs(thanks ls1jeeper)

Spare/jack/everything in trunk: ~50lbs

Front Floor mats: 4lbs total

Rear floor mats: 2.5lbs total

Rear Muffler heat shielding: 5lbs

Stock spoiler: 5lbs

Stock battery: 6 lbs heavier than a red top

Stock airbox/filter: 4.5lbs(thanks chris442)

Stock Exhaust manifolds: 28-31lbs

Stock driveshaft: 27lbs
(trans yoke, 2-piece shaft, rubber donuts, all bolts)

Difftechnics driveshaft: 17lbs

Stock 04 midpipes w/ cats: ??lbs

Stock 05-06 midpipes w/ cats: 50lbs(thanks chris442)

Exhaust after mids until mufflers: 23lbs(thanks ls1jeeper)

Stock 05-06 mufflers: 56lbs(thanks ls1jeeper)

Stock 17" wheels/tires: 52lbs each.

Stock 18" wheel/tires: 54lbs each. (thanks 87LC2)

19x9.5 TSW Thruxtons w/ 265/30's: 50 lbs.

19x8 TSW Thruxtons w/ 235/35's: 48lbs.

19x8 Niche Rhine wheel/tires 235/35: 51lbs

17x8 OZ Super's: 43 lbs.

Headers and catless exhaust - lots of weight saved(~30lbs)

Weight going to LT's is 15lbs saved
Weight going to shorties is 17lbs saved

Cats alone weigh around 15lbs I know since I just shipped them out the other day.

Anybody feel free to weigh items and post it here and I will edit in into this first spot.

Disclaimer: Any weight savings listed have nothing to do with safety. Anyone who removes a fuel tank brace knows why they are doing it.

 

Really good info there, Johnny. Thanks.

 

Hey, no problem.

 

This battery is in use in one '05 GTO that I know of, without any problems. It is much lighter than an Optima.
http://www.exoticperformanceplus.com....html?item=834 Bob

 

How about the glove compartment cover.

 

I just weighed my stock exhaust vs. the magnaflow system. The result is an 18 lb. weight savings if you have a magnaflow system on a 2004 GTO. Not sure about the 2005 or 2006 systems.