im doing the swap thursday from slps to the pacesetters.i was under the impression not to use the gaskets that come with the lts if so then what should i use?

 

There are copper gaskets made for LT1s on ebay for $27 shipped (20+7). I'm thinking about using those this time around.

 

FELPRO D port shape 1406 i think is the number that works really well for alot of people including me.

 

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I used those on my AS&Ms and they worked well.

 

part number felpro1406 or felpro d 1406.is there a difference?ebay is out of the question i need by thursday.

 

The autozone here carries aftermarket gaskets, might wanna check your location.

 

which aftermarket gasket?

 

i will be using felpro gaskets on my pacesetters that just got here today

 

I'm using Earl's Performance Plumbing Pressure Master gaskets for the LT1. They're aluminum with graphite around the ports. Putting them on in a few days. Got them from Summit for $37.00.

 

u should get those,
i hear the copper gaskets suck and seen pics of where they leak

 

I have used the Earl's performance gaskets for years on my Impala SS. On more than one occation i have lost more than one header bolt with no leaks. One time at the track I lost 3 on one side and no leaks. I'm sold.
HVY SS

 

are u sure 1406 is the part number need to pick up tomorrow.dont really want to use the ones that came with the headers they look cheap!

 

yeah thats the part number i ordered them from summit. Autozone usually carries the Mr. Gasket LT1 stuff but ill be honest they aint anything good. Id stick with the 1406 from Fel Pro

 

I used Mr. Gasket on my hooker long tube headers.The hooker headers had square ports.Does all hooker lt1 headers have square ports or do some have D shaped ports like the lt1 heads.My gaskets were for the square shaped ports.I have no leaks and for some reason i didn't see any gains with my headers.It does sound better.

 

I used the ones that came with the headers. 14 months so far and not had any problems. I would not use the copper ones from ebay they suck bad. You have to goop on lots of silicone just get them not to leak! But use what you want as long as you check your header bolt every now and then to make sure they are still tight.