EGR? Exhaust cross over from heat riser valve on one side of exhaust? Don't know what intake you have? Both those help MPG and cold warm up and drivability...
EGR? Exhaust cross over from heat riser valve on one side of exhaust? Don't know what intake you have? Both those help MPG and cold warm up and drivability...
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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