View Full Version : 2006 Silver C6 Z06 Forged 427 LSx 6 Bolt Block & Mast Heads

08-02-2012, 02:39 PM
*EDIT 8/31* Got official word I'm getting layed off at work so car has to go. Car is a 2006 2LZ w/~29,500 on the odometer. New motor & clutch installed in Sept 2011. Motor has ~3K miles & clutch has about ~1500 miles.

GM Performance Parts iron LSx 6 bolt block, 11.25:1 compression, Callies compstar forged crank & H beam rods, Wiesco forged nitrous pistons, Morel link bar lifters
Mast 285 6 bolt heads w/stainless valves & PAC .700" lift springs
Custom spec Comp 235/247 .658"/.661" 114+4 LSL lobe cam
Fast102 intake w/Mike Norris ported stock 90 mm TB
60 lb Siemens injectors
Kooks 1 7/8" ceramic coated stainless headers & raw finish stainless offroad X pipe
Tuned by James Short, made 486rwhp on his very stingy Dyno Dynamics Dyno (estimated ~523rwhp on a dynojet)
Katech valve covers w/coil pack relocation
Mike Norris catch can
Stock dual mode exhaust
Mild to wild controller w/fobs & homelink garage door visor button control
Haltech dual wide band O2's
McLeod RXT twin disk clutch & steel flywheel
Remote clutch speed bleader
C5 rear axle shafts (purchased new from GM)
Black reproduction Spyder wheels with Nito Invo's F&R + extra matching rears w/Nitto NTO5R drag radials & TPMS sensors
GMPP full length rear lip spoiler
Tinted windows
Bose factory sound system w/6 disc in dash changer & XM
Heated black leather seats w/side airbags

History. In the spirit of full disclosure here's the story on this car (which I've owned twice). Traded my '06 C6 A6 for the Z06 back in the fall of 2009 at a local Chevy dealer. In the fall of 2010 I had a fender bender that lightly damaged the driver's front corner of the car (see pics later in thread). I had a friend that wanted the car as is so took his modded C5 on trade + boot. He fixed the car with a used GM factory carbon fiber fender & a new GM nose then had the paint blended to match. Paint match is perfect as shown in pics. After a few months of driving the car he did a cam swap & 2 weeks later an exhaust valve broke which trashed one head, one piston & a cylinder liner in the stock LS7. He was in the process of buying a house so the car sat until the fall of 2011 when I traded a different modded C5 + boot to get it back. I sold what was left of the stock LS7 motor & bought the LSx block Mast Headed motor complete from a guy off VetteForum. Car has clean title but the accident history does show on Carfax.

Performance. Car has run best of 10.98 @ 129.4 in the heat on a soft 4,500 rpm launch with a 1.74 60'. With a higher launch & some good air car should 60' in the mid 1.5's & run mid 10's all day long. This setup runs good NA, but it is begging for a power adder to take full advantage of the flow capacity of the Mast Heads. I had intended to put on a nitrous kit this fall & try to run some 9's. Driveability is good for a cammed car, can lug 6th gear at 60mph with no surging. Car can be daily driven & you could head to California with it for a road trip if you wanted.

Condition. Car is nice but has been driven & enjoyed so it has a few character marks. Interior is nice, no issues. There are some paint chips on the nose of the car. They don't stand out from 5' away but when you start washing & waxing you notice them. Also some chips around the rear brake duct inlets. I've never had anyone notice or comment on paint chips. Also the front passenger side corner of the hatch is damaged where it meets up with the 1/4 panel. I think maybe the rear hatch needs to be adjusted back an 1/8" or so to increase the gap. I attempted to show pics of all the defects mentioned.

Car is located in Lexington, KY. SOLD!!!. Also please don't PM me asking my best price, if you have an offer please send it & I will respond promptly.

Here's a few iPhone pics & an idle vid:

Idle Vid with Exhaust Open (click pic to play) (

08-02-2012, 10:26 PM
Bump for a bad ass car... I have seen it in person and I have seen it it action!! hell of a car!!

08-05-2012, 05:10 PM
Forgot to mention in orginal ad that the shortblock was built by Fran & the guys at RPM.

08-07-2012, 09:32 PM
Also forgot to put in ad the car has upgraded rear shafts (brand new C5's from GM).

08-08-2012, 03:29 PM

08-08-2012, 03:32 PM
Interested in my 06 gto? Fully built with 408 and turbo built by SNL Performance.

08-13-2012, 10:31 AM
Interested in my 06 gto? Fully built with 408 and turbo built by SNL Performance.

PM sent.

08-14-2012, 09:13 AM
Price reduced to $42,500.

08-16-2012, 11:21 AM
This car has had all the typical C6Z06/LS7 weak points addressed. The LSx block is good to 2500 hp so no weak Aluminum block cracked sleeve issues to worry about NA or with a power adder. The Mast heads have one piece stainless valves so no broken two piece valves to worry about. The weak stock clutch has been replaced with the ceramic twin disk & remote speed bleeder so no clutch pedal stuck to the floor or slipping issues. Also no worries about broken rear axle shafts with the upgraded C5 shafts.

08-17-2012, 10:37 AM
Here's some pics of the motor from when I bought it. Mast heads where installed the day before I picked it up.

08-17-2012, 10:48 AM
For those curious about the fender bender damage here's pics.

08-20-2012, 10:16 AM
Dyno sheet in Dyno Dynamics #'s:

& corrected to estimate Dynojet #'s:

08-21-2012, 07:23 PM
Bump for a good seller, good friend and a badass car.

08-31-2012, 10:35 AM
Got official word this week that I'm getting layed off so car has to go. Price has been lowered in 1st post. If I can't find a buyer by Sept 5th I'm removing some parts & letting it go to a dealer that has made me an offer.

09-01-2012, 10:03 AM
Sat morning coffee bump.

09-01-2012, 10:32 AM
Badass car. I wish it was black because I'd come get it Tuesday.

09-06-2012, 10:34 PM
Car is sold. Going to it's new owner in Texas this weekend.