HEADER PORT SIZE QUESTION??

[banzai510(hainz)]

Is that header for a 510? The Routing is something I never seen before!!!!!!!!!!!!!

I seen those before,On that guys website but he sell the shorty one also . I think he sells these for over 200$ while you can get the same shorty header from TOP END Performance for 150. These are made by Trillmill out of Los Angeles.
I have one but never ran it. But people I have seen them said they are OK. But the Paint sucks and needs to be Ceramic coated. Also heard of leaks sometimes but rare.

I only really recommend them if you got to get rid of the nasty L20b exhaust manifolds as they are hard to get the lower intake/exhaust bolts. For for simplicicty reasons. headers are noisey

I myself still run the stock L16 cast manifolds. Maybe one day I will try my header out.

[okayfine]

But people I have seen them said they are OK.

The collector is crap and too large, and the "downpipe" for the longer one is very restrictive.