Dyno results!!

[The Radium King]

what maf housing are you using in that setup? if you've got any maf-related fault codes and the car is defaulting to the throttle position to determine airflow, the larger throttle body will mess up your trims.

[j.fro]

I cut the MAF housing from the original airbox. The car isn't throwing any codes, and it has a new MAF and 4 new O2 sensors.

[shadrach74]

Interesting, given that time and time again it's been said that there is little in the way of "real HP gains to be had by tweaking the exhaust, especially with cheap Chinese eBay headers and bypass pipes. Are you running without cats?

[Ghostrider 310]

Originally Posted by shadrach74

Interesting, given that time and time again it's been said that there is little in the way of "real HP gains to be had by tweaking the exhaust, especially with cheap Chinese eBay headers and bypass pipes. Are you running without cats?

Seems to only be repeated by those who have the equation Chinese = crap drilled into their heads. My China headers were T304 stainless and they gave the 986 a true HP boost and an upper register snarl as awesome as any car. Simply stated the underpulley and headers IMO were the best two 986 mods.