Proform Fits GM LS Engines with 3/8" Wide Flange 66826 1990-dodge-spirit-esi3207331 1998 Chevrolet K2500 WT 1977-1981

1998 Chevrolet K2500 WT 1977-1981 Chevrolet K30 Cheyenne 1981-1986 Chevrolet K30 Custom 1977-1980 Chevrolet K30 Custom Deluxe 1981 Chevrolet K30 Deluxe 1977-1986 Chevrolet K30 Scottsdale 1977-1986 Chevrolet K30 Silverado 1968-1974 Chevrolet K30 Pickup Base 1994-1997

Captures damaging vapors and particulates capturing blow-by and reducing long term wear and tear on your engine

Mishimoto silicone hoses retain OEM fitment while providing increased pressure tolerance for the ultimate upgrade in performance and style

50-inch aluminized steel inlet pipes flowing into a pair of 50 Series™ Delta Flow® mufflers for maximum performance and a mellow but powerful sound

This system includes a single dry nozzle (no fuel)

Proform Fits GM LS Engines with 3/8" Wide Flange 66826 1990-dodge-spirit-esi3207331 1998 Chevrolet K2500 WT 1977-1981Each PROFORM Grade 8 Header Bolt is permanently assembled with a pair of special washers. When the bolt is torqued to 28+ ft lbs, the washers super hardened external teeth bite into and grip the bottom of the bolt head and the top surface of the header. After being self locked in this manner, any bolt loosening rotation is blocked by a wedge locking action created by the washers interfacing, matching cams. Its an uphill climb: vibration that might