QA1 63 Series Shock 9" Rear 4C/6R H777C02XL "Quick Change" -- a new

"Quick Change" -- a new standard of convenience from Holley

This system replaces the factory transverse muffler and relocates the Super HP-2 muffler behind the factory catalytic converter

272 cc Intake

Electric Fan Control

Made from 100% medium tensile carbonWeight (intercom included) +/-30 g:

QA1 63 Series Shock 9" Rear 4C/6R H777C02XL "Quick Change" -- a newThe 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. QA1 specializes in high performance