Head gasket question.

Reply Subscribe

Thread Tools

Search this Thread

Feb 7, 2012 | 03:00 PM

custm2500

Thread Starter

Ph.D. in HUBRIS

iTrader: (11)

Joined: Mar 2009

Posts: 3,964

Likes: 0

Head gasket question.

I am wanting to confirm this is the correct head gasket for my 408.
http://www.ebay.com/itm/GM-Performan...546098&vxp=mtr

I see some people talking about the gaskets being for a 4.030 bore and others not. Wasn't sure if all the gaskets were good for the larger bore.

Feb 7, 2012 | 03:04 PM

redbird555

TECH Veteran

iTrader: (14)

Joined: Mar 2009

Posts: 4,444

Likes: 9

From: Pompano Beach FL

nope you need the bigger gaskets the piston will always come out of the top of the block just a hair and therefore the gasket must match the block that kit is for a 3.89 bore on an ls1 you need the custom size for a 408 give scoggin dickey or tsp a call and they should be able to set you up

Feb 8, 2012 | 04:13 AM

custm2500

Thread Starter

Ph.D. in HUBRIS

iTrader: (11)

Joined: Mar 2009

Posts: 3,964

Likes: 0

I was looking on summit's web site and they have some gaskets for 4.000 and 4.190. Would .030 too small be a problem? Would .070 be a problem? What way do I need to go. Thanks.

Obviously Texas Speed has 4.035 gaskets but I was hoping one of the two from summit will work because I get stuff from them in one day. Thanks.

Last edited by custm2500; Feb 8, 2012 at 04:37 AM.

Feb 8, 2012 | 08:41 AM

wildcamaro

TECH Addict

iTrader: (15)

Joined: Nov 2009

Posts: 2,501

Likes: 4

From: Western PA

If I were I would just get the tsp gaskets...if you spend the $ for a 408 chances are you should get the tsp...I live in pa and was suprised how fast they shipped (like 3 days for a head/cam kit)

Feb 8, 2012 | 08:55 AM

custm2500

Thread Starter

Ph.D. in HUBRIS

iTrader: (11)

Joined: Mar 2009

Posts: 3,964

Likes: 0

Summit does have a 4.030 gaskets. I didn't find them when I first posted this but since have. Only down side is they are $100 per gasket vs. $35 for both. Big differance.