NOS/Nitrous Oxide System - Nitrous Bottle Purge Valve for -4AN Line 450 in Long - Hex

450 in Long - Hex Head - Stainless - Polished - GM - Pair

Tread Depth Gauge - 1/32 to 7/16 in Tread Depth - Mechanical - Analog - Black Storage Pouch - Each

Driving Gloves - Outseam - Single Layer - Aramid - Black / Gray - Medium - Pair

Oil Pump Drive Shaft - Chromoly - Big Block Chevy - Each

Coil Spring - Conventional - 5 in OD - 13 in Length - 300 lb/in Spring Rate - Rear - Steel - Red Powder Coat - Each

NOS/Nitrous Oxide System - Nitrous Bottle Purge Valve for -4AN Line 450 in Long - HexThe primary purpose of a purge valve is to release trapped air or gaseous nitrous from feed line(s). Helps to ensure consistent performances. And it looks cool, too. You've probably seen the Import or Pro Mod guys do it. Includes all required components.