Comp Cams Dual Valve Springs: 1.430" O.D. Outer, .697" I.D. Inner 14-17 BMW M3/M4 (F80/F82) Flows approximately 20% more air

Flows approximately 20% more air than OEM

These clamp directly onto factory bed rails — no drilling required

Integrated switch — Standalone control

From 9/02 Thru 8/08 Production Date w/ Large TMIC

Does the bracket bolt to factory holes

Comp Cams Dual Valve Springs: 1.430" O.D. Outer, .697" I.D. Inner 14-17 BMW M3/M4 (F80/F82) Flows approximately 20% more airDual Valve Springs: 1. 430" O. D. Outer, . 697" I. D. Inner Dual Valve Springs from COMP Cams are manufactured from Super CleanT wire and subject to extensive quality control testing to deliver a valve spring assembly with superior strength, durability and valve train stability, no matter what the application. The dual spring design creates a stronger valve spring that can easily handle the increased lift found in extreme stress applications. COMP