TB48 Valve Spring & Retainer Kits
Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. BC titanium retainers are CNC machined from 6AL4V round bar titanium to exacting tolerances.
Single spring, titanium retainer
Spring Pressure: BC1250 Seat: 1.470" @ 75 lbs / Open: 1.000" @ 203 lbs / Coil Bind: 0.935" (no machine work required)
TB48 Stainless Steel Valves
BC valves are one piece design with a friction welded Stellite tip for the best possible performance. Every valve is made from premium grade, heat resistant stainless steel material to insure reliability with high boost and/or high rpm applications. The undercut stem above the head area not only reduces overall weight for extended rpm potential, but also significantly improves air/fuel flow in and out of the combustion chamber. Every valve is fully machined and features a swirl polished finish under the head.
Stainless Steel Intake Valves (set/12). Standard head diameter (38.5mm).
Stainless Steel Exhaust Valves (set/12). Standard head diameter (33.5mm).
Stainless Steel Intake Valves (set/12). +1.5mm head diameter (40mm).
Stainless Steel Exhaust Valves (set/12). +1.5mm head diameter (35mm).