Woolf Aircraft Products 90 Degree Exhaust Bend - 3" Diameter - 3" Radius - 16 Gauge - Steel 935011 This tells the ECU which

This tells the ECU which cylinder is cylinder #1 (or the first cylinder in the firing order as entered in the software)

Pit Stop USA offers Triple X Sprint Car X Wedge Chassis Kit - Plus 2" - 87/40 SC-CH-1000872HNW at low everyday prices

Stock Number 4654

this insert also comes with corrosion resistant hardware and a 5-year limited warranty

relief spring

Woolf Aircraft Products 90 Degree Exhaust Bend - 3" Diameter - 3" Radius - 16 Gauge - Steel 935011 This tells the ECU whichProduct Description: Exhaust Bend 90 Degree 3 in Diameter 3 in Radius 16 Gauge Steel Natural Sold Individually Specializing in custom cutting, bending, and welding of metal tubing since 1942, Michigan based Woolf Aircraft Products manufactures components for a number of industries from aerospace to defense to performance automotive. They produce a variety of high performance headers and exhaust components to fit a wide range of applications.