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
From Anthoney Casler of West Palm Beach, Florida on 2/5/2008.
Nice unit, but it needs to have some work done to it at the muffler shop to have it bolt up the oe muffler or Borla. the tubing is to large to use the oe muffler clamps too. I had the muffler shop weld the two pieces together ( it comes as a two piece )and reduction pipes inserted into the ends of the VSR and welded, so it bolts up oe style now. I also, found the noise to loud with the Borla conected to the VSR for street use, so I went back to the oe muffler/VSR combo and it's perfect.
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