Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9

LS3 cometic head gaskets

Thread Tools
 
Search this Thread
 
Old Jun 30, 2010 | 11:36 AM
  #1  
miniklr's Avatar
Thread Starter
Teching In
 
Joined: Aug 2004
Posts: 46
Likes: 0
From: St. Louis, MO
Default LS3 cometic head gaskets

Stock 2010 Camaro SS with Procharger kit. Stock bore is 4.065", the Cometic gaskets I have are 4.090". I'm real leary of installing these with that bigger bore on the gaskets.

I have ARP studs I'm putting in, and need to repair header bolt threads that the Percy's bolts stripped out. So the heads are coming off.

Would stock LS9 head gaskets be a better choice?
Reply
Old Jun 30, 2010 | 11:40 AM
  #2  
Beau@SDPC's Avatar
LS1Tech Sponsor
iTrader: (14)
 
Joined: Feb 2009
Posts: 2,262
Likes: 2
From: Lubbock, TX
Default

The Gm stock MLS gaskets are nearly that size also. They range from 4.085 to about 4.087 or so. No reason to question that.
Reply
Old Jun 30, 2010 | 11:46 AM
  #3  
miniklr's Avatar
Thread Starter
Teching In
 
Joined: Aug 2004
Posts: 46
Likes: 0
From: St. Louis, MO
Default

Good to know. If that's the case, the Cometics should work out perfectly. Thanks for the reply.
Reply
Old Jun 30, 2010 | 12:05 PM
  #4  
Whistler's Avatar
Sawzall and Welder Mod
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (46)
 
Joined: Nov 2001
Posts: 2,486
Likes: 4
From: Orlando, FL
Default

They'd be fine even if they were a little bigger.
Reply
Old Jun 30, 2010 | 07:37 PM
  #5  
John B's Avatar
Moderator
20 Year Member
Photogenic
Photoriffic
Liked
iTrader: (10)
 
Joined: Nov 2001
Posts: 3,264
Likes: 21
From: Phoenix, AZ
Default

The LS7 has a 4.125" bore and the OEM gaskets are 4.150"!
Reply




All times are GMT -5. The time now is 03:44 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE