Quote:
Originally Posted by DisturbedSS
If you can find one that hasnt been altered in some way by the previous owner (hard to find), youre normally golden on a private or dealer purchase.
Emissions laws change all the time from state to state, so no surprise cities as yours arent as strict.
Aside from sound, did you "feel" a difference in previous header swaps? I didnt gain much on my previous mustang, then again they were shortys.
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I did CAI, UD crank pulley and full exhaust with tune all at the same time. The car made 435 rwhp with those mods. Didn't get a stock baseline but average was about 380 for ls3 m6. Yeah it was a pretty dramatic difference. As far as just headers they were worth about 30-35 alone on the ls3 especially if you got 2 inch primaries (proven same day Dyno comparison by Ted). They are worth only about 20 at most this time around from results I've seen from others. Stock tri y better than ls3 manifolds not as much to gain.