Active Autowerke E46 M3 Prima PLUS + Supercharger with 600 horsepower Kit (12-035S) _Under_The_Hood 184 lbs/in (OEM) vs 323

184 lbs/in (OEM) vs 323 lbs/in (APR) or a 76% increase in Spring Rate

Works with most 1989 (1987 Mustang) and later Ford

Seibon's manufacturing process integrates carbon fiber directly into the mold supported by a fiberglass skeleton

Specifically designed with a lot of thought into improving the airflow issues inherent to the 370Z

The muffler and all pipes of the Apollo GT system are constructed from durable 409 stainless steel

Active Autowerke E46 M3 Prima PLUS + Supercharger with 600 horsepower Kit (12-035S) _Under_The_Hood 184 lbs/in (OEM) vs 323The Active Autowerke PRIMA PLUS Supercharger System for the BMW E46 M3 enhances performance beyond the original PRIMA system, delivering over 500 WHP on 93 octane fuel. Developed with tuning expert Frank Smith of Tuning Tech FS, this centrifugal supercharger features variable boost settings of 9. 0 and 9. 5 psi, setting a new standard in BMW forced induction. Complete water methanol injection system with trunk mounted tank and holding base Water