exhaust manifold
 

my exhaust manifold has a pin hole on my 502 415hp and was wondering others input on what exhaust i should get now. Thanks for any help.

I have imco power flow very happy with them

If it's a completely stock 502, probably not much if any performance gain going to a performance exhaust or header. Stock Merc manifolds and risers are plentiful and relatively cheap if you want to keep costs down, or look for a set of the Merc 496 manifolds and risers. There is an aluminum version of these that will save some weight, and they also eliminate the wet joint between manifold and riser that is the demise of many engines when they start leaking. Other than that, take your choice of IMCO, Stainless Marine, Gil, etc.

thanks buddy of mine is actually giving me a set of stainless marine. just have to test them. any input on pressure testing them? whats the best way to test the risers?

if leaving the engine stock i would replace with another set of merc stockers,they are cheep&plentyfull.

Ive got stainless marine and they seem to be pretty bullet proof, jmho