white1

iTrader: (5)

Which gaskets do I need for my 5.3? Are the LS1/LS6 gaskets them? Also with milled heads .020 can I use the thinner gaskets? Thanks

BigKID

iTrader: (5)

If I were you I would just use the stock graphite gaskets for your truck. You are not making enough power to warrant the coin for cometics plus I dont think they make a 3.622 bore ls typegasket. The 3.905 ls1/6 bore gasket is not right for your 5.3.

Silver-Dollar

iTrader: (1)

You get away with 3.905 bore size if your heads are 3.905. I called AFR not to long ago about his. Look at new heads and wondered if I needed to cylinder bore to match heads.

white1

iTrader: (5)

Thanks for the help.

Bigkid, I was wondering if it was worth it for me to use the Cometics. Thanks

BigKID

iTrader: (5)

You can also get the graphite gaskets from NAPA. I hear they are exactly the same as the GM ones but half the price. I used GM gaskets only because I have a hookup at the dealership.

TURBHOE

iTrader: (4)

whitch one are the thicker ones from gm anybody know?

BigKID

iTrader: (5)

The compressed thickness of the GM graphite gasket is .054" and the GM MLS gasket is .060".

99Silver6.0

iTrader: (1)

Use the FelPro 1041's MLS gaskets if you want thinner. They are .041 compressed. Compressed thickness on a stock 6.0 gasket is .052.

I think Cometic can make what you need. But it is not cheap.

Grey Silver

iTrader: (1)

Cometic makes gaskets for the 5.3, I've got a set on my truck. I think I gave 150 for them but they're reusable.

TURBHOE

iTrader: (4)

i just want a good gasket that can hold 7-10 pounds of boost on a ls1 that is a little thicker to get the compression down some.