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 along with 5 sound categories

along with 5 sound categories of exhaust systems

Available in Thin and Medium thicknesses

Mazda Miata 2005-15

621 in Rectangle Port

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 along with 5 sound categoriesProduct 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