What we found:

Shorty headers, unequal length: 8RWHP on heavily modified NA car, 14RWHP SC car

Shorty Headers, Equal Length (evosport): Don't fit the Crossfire so no need to test.

Long Tube Headers: Same as above, nothing for the Crossfire.


Out of the options out there, we've seen the best gains with the equal length shorties on C320/C32. The long tubes are supposed to net some great results, but none to test yet.