Dyno testing has shown a gain of 4-5 hp over the stock catalytic converters, but more importantly a significant gain in torque at lower rpms.
VSR designed it to tuck up high in the transmission tunnel for more clearance and less aerodynamic drag and eliminated many of the unnecessary bends and the power robbing crushed section under the rear suspension. All for a price very close to half the factory replacement section! 2 piece construction, fits 1987-1991 E30 M3 only.
nice replacement From Anthoney Casler of West Palm Beach, Florida on 2/5/2008.
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