QA1 63 Series Twintube Shock - 7 in Stroke - C4-R6 Valve 35605 From those early track-side days

From those early track-side days

Screw-In Type

oval and drag racing

and are designed to hug close to the engine block so they fit into a wide variety of replacement and engine-swap applications at a budget-friendly price

each master cylinder weighs only 3lbs

QA1 63 Series Twintube Shock - 7 in Stroke - C4-R6 Valve 35605 From those early track-side daysThe 63 Series is a sealed non rebuildable version of the 62 Series. These are most commonly used in coil over applications on both dirt and asphalt tracks. The twin tube design gives excellent feel and grip across all track conditions, but they really shine when there is a lack of grip. Built as a spec shock that could be used at specific tracks or series, the 63 Series can be used in any late model or modified. Product Description: Shock 63 Series