Originally Posted by Davenow
I have yet to see equals that spool as fast as unequals. They do make more power in the upper mid and top end, but I have yet to see one make the low end that an unequal does.
my synic motorsports headers spooled several hundred rpm sooner over ported OEM manifolds. that was before tuning as well. the problem was that i had two sets crack < 6 months after installing them.
i'm through with with stainless manifolds on subarus.