Hello everybody i bought an ls1 for my 98 trans am which had snapped a rod and cracked the block. The headers are 1 3/4in. Theres no stampings on them and on the larger header on the inside of the flange i found the what i believe to be part number 115-832325R 4581. Can anyone help me identify these headers? Are these even for a trans am? What companies y pipe will work? Thanks

 

They look like F body headers. Brand ?

 

If they have no stamping on it ill take a shot in the dark and say they are eBay headers..

You can try and fit your stock y pipe up to see if they are close..

But that does look like a f-body bolt patter. On the flange.

 

I don't think those are eBay headers due to the way the collector would attach to the y-pipe. I don't remember which brands have that connector, though (Mac? BBK?).

 

Didn't jet hot headers have that crushed in primary right before the collector like these do?

 

The dent in them is from hitting something which isn't a big deal i can repair them. They kind of look any old slp headers. Anyone have an idea of what y pipe will work? I really wanna run these headers.

 

those are FLP headers. They arent made anymore but when they were they were some of the best around. The only y pipe that i know of besides a custom one is the flp y. It was pretty cool as it had quick connects to add or remove cats from it and replace them with a straight pipe when wanted. New the system was around 1200 bucks

 

I think you're right. Check in the collector to see if there is a velocity spike.