Brian Tooley Racing Dual Valve Spring Kit - 380 lb. - 1.070 in Coil Bind - 1.300 in OD - Locks / Titanium Retainers / Viton® Seals / Seats - GM LS-Series T740803 621 in Rectangle Port

621 in Rectangle Port

Rear Main Seal

12 ft Long Power Cord

TPS calibration

Mazda Miata 2005-15

Brian Tooley Racing Dual Valve Spring Kit - 380 lb. - 1.070 in Coil Bind - 1.300 in OD - Locks / Titanium Retainers / Viton® Seals / Seats - GM LS-Series T740803 621 in Rectangle PortProduct Description: Valve Spring Kit Dual Spring 380 lb in Spring Rate 1. 070 in Coil Bind 1. 300 in OD Locks Titanium Retainers Viton Seals Seats GM LS Series Brian Tooley Racing (BTR) started as a small operation fueled by Brian Tooley's passion for engine performance and innovation. In the early 1990s, Tooley began his journey in the performance industry by working on cylinder heads and founding Total Engine Airflow (TEA). Eventually, he shifted