lt1badbird

iTrader: (-1)

i picked up a set of fel-pro LT1 exhaust gaskets and they were WAY to small for the ports on my AFR 227 headed turbo 383. a guy at a speed shop said i could just copper rtv around al the ports and headers. will this hold up with no gaskets?

ss.slp.ls1

iTrader: (36)

I've seen people do it. If it were me, I'd try to find some copper gaskets that match or open them up to match the heads. Call up AFR and ask them what gaskets they recommend.

moderate Z28

I would NEVER do this. Just think about the huge mess you will have if you ever remove the headers. And also the mess from all of it squeezing out.

killagt

iTrader: (3)

USE COPPER RTV ON THE GASKET !!!!!, do it one and do it right, never worried about leak later, On mustang world, we all did it when we install off road H or X pipe. work the best. im plan to do it on my z28 too.

Lonnies Performance

iTrader: (16)

The copper RTV is an excellent way to do it. Only use the Permatex brand of Ultracopper. It holds up well. I use it on every header gasket I install. It only takes a light coating to keep everything sealed up.

Using it in place of a gasket will not work well.

Kooks even provides an aluminum gasket & recommends you coat it with RTV......

Chevyguy358

iTrader: (4)

umm wow, guess I have never heard nor considered this an option

BLINGOLE

iTrader: (5)

i would of never thought it would work... ill try it next time

gold98Z28

iTrader: (7)

copper coat spray + copper RTV = never leak again

SoxXpupPeT

iTrader: (34)

itll work but what a mess omg! i use the RTV high temp for my split primary on my mac mids. works beautifully

lt1noob

iTrader: (4)

id do this as a secondary option, like ss.slp.ls1 said, call afr first and see what the recommend and make your decision from there.