Simply put
The Heatshield gasket kit gives you 4-5% more power immediately by lowering the intake temperature
Base Dwell: 3
Please refer to the Electrical Requirements section in the instructions document for proper wiring
The hotter the air
B, D, F, H Series Rear Crankshaft Seal Spark Simply putFits: B16A, B17A, B18C, B18B, B18A, B20B, B20Z, D16Z, D16Y, & H22A NATIONAL 228015 National Oil Seals feature the following: A proprietary RediCoat sealant to eliminate bore leakage. Patented lay down sealing lip design ensures long life in spite of extreme temperatures, shaft imperfections, shaft bore misalignment and excessive shaft thrust or movement. Alternate OEM Part Number(s): 5862068190, 5862074860, 91214P2FA01, 91214P8AA01, 91214PAAA02,