Proform 1.600-2.100" Range Valve Spring Height Gauge 0.005" Scale SPBXL2 With the stock manifolds considered

With the stock manifolds considered a maintenance item due to corrosion and leaking

5" dish design with polished 6061 aluminum spokes

For 2009+ GM 4L60/80E Transmission use Holley EFI Part Number 558-455

Daytona Pinion Bearing Retainer

Proform 1.600-2.100" Range Valve Spring Height Gauge 0.005" Scale SPBXL2 With the stock manifolds consideredProduct Description: Valve Spring Height Gauge 1. 600 2. 100 in Range 0. 001 in Scale Sold Individually PROFORM invites racers to experience the strength, innovation, and power behind the PROFORM brand. PROFORM Parts (Specialty Auto Parts U. S. A., Inc.) is a leader in the High Performance Automotive Aftermarket by engineering and manufacturing creative products from intelligent concepts. Our goal is to provide the performance enthusiast with