Knuckle add-ons with hardware

such as tapping into the intake manifold

Red Spring rated to -17 to -14 InHg (installed)

S13 kit is for the 4 lug spindle

IWG75 Borg Warner B3 160mm Rod Black 14 PSI Chevrolet Knuckle add-ons with hardwareDesigned as a stock replacement for the B2 frame single and twin scroll EFR range of turbos, with 160mm rod. Turbosmart Internal Wastegate Actuator provides better turbo response and greater sensitivity when managing boost pressures. FEATURES: Silicone diaphragm with Nomex reinforcement to withstand high temperatures. High grade, billet aluminum construction. Stainless steel rods and connecting clevis for corrosion resistance. Locking Collar design