Eibach Bump Spring 2" O.D. x 2.25" 1750lb 57400BK By installing either the side

By installing either the side forced air or top forced air kit

Allstar Adjustable Centerlinks

12 / 18 Degree Heads

Torrington thrust bearings reduce friction between the block and cam sprocket

Eibach Bump Spring 2" O.D. x 2.25" 1750lb 57400BK By installing either the sideProvides virtually unlimited tuning for dirt or asphalt racers using soft spring set ups. Lightweight and compact to meet the needs of pavement racers, while including the maximum linear travel required by dirt racers. Precision fit cap system is compatible with 1 2" or 5 8" shaft sizes. Maximum Travel in All Rates with Repeatable Performance Block and Sag Resistant Increases Aero Efficiency, Grip and Control at the Limit Made By Eibach in the U. S.