QA1 Mod Series Twintube Double Adjustable Shock - 12.88 in Compressed / 19.50 in Extended - 2.00 in OD - Black Anodized M711PR 420-01 Boost dependent rising fuel pressure 2 1 2 to M77MS829H30 1303LS1-3 Size:Youth 2X-Large

Boost dependent rising fuel pressure rate (1:1)

Winter's Aluminum Front Spindle/DMI Rear Spindle with Steel Ring

Systems use Intercomp’s RaceWeigh™ Software & four Billet Scale Pads with integrated RFX™ Wireless Weighing Technology to transmit data from the scale pads to a PC

Plug-In Installation

Late model Big Block Chevrolet engines are originally equipped with exhaust valve rotators

QA1 Mod Series Twintube Double Adjustable Shock 12.88 in Compressed 19.50 in Extended 2.00 in OD Black Anodized M711PR 420 01 Boost dependent rising fuel pressure 2 1 2 to M77MS829H30 1303LS1 3 Size:Youth 2X Large Boost dependent rising fuel pressure rate (1:1) Winter's Aluminum Front Spindle DMI Rear Spindle with Steel Ring