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Dual Rate Spring (327 lbs/in to 448 lbs/in Rear)
The IECVA3 Street Intake Camshaft is perfect for mid-sized aftermarket turbo builds in the 300-500 horsepower range with an ideal powerband of 4000RPM-7500RPM
which then reduces to a 2
85mm inlet side to 66mm turbo side (before adapter plates)
it's the only way to ensure an accurate fit and perfect seal
VRSF 3.5" Cast Stainless Steel Downpipes | F97 X3 M · F98 X4 M E90 · E91 325i 3.0L I6 [N52] Dual Rate Spring (327 lbs/inWe are proud to introduce our Racing Downpipes for your F97 & F98 BMW X3M & X4M. These stainless steel tube down pipes are the best bang for the buck mod available for your S58, with gains from 30 whp & 35 wtq as a direct bolt on and gains of up to 60 whp and 100 wtq when paired with a DME remap. By replacing the restrictive catalytic converter in the factory downpipes with our high flow, 200 cell catalytic converter, back pressure is significantly
