RaceTec AutoTec Forged Flat Top Piston - 4.040 in Bore - Coated Skirt - Small Block Chevy - (Set of 8) 1000110 WIL140-12321 Vacuum Ports: 1 timed (spark) 2 1 2 to M77MS829H30 1303LS1-3 Size:Youth 2X-Large

Vacuum Ports: 1 timed (spark) port

Included in this header's long list of applications is 1999-2006 Chevy/GMC 1/2 to 1 Ton 2WD and 4WD Silverado

EFI fuel rails are machined for -8AN O-ring Fittings with passages large enough to accommodate high fuel flows and dampen pressure pulsations in the fuel system

4 port regulators feature a 10 AN O-ring inlet and return with (4) 8 AN O-ring outlets

The Ultimate Master Racing Overhaul Kit from TCI contains the performance clutches

RaceTec AutoTec Forged Flat Top Piston 4.040 in Bore Coated Skirt Small Block Chevy (Set of 8) 1000110 WIL140 12321 Vacuum Ports: 1 timed (spark) 2 1 2 to M77MS829H30 1303LS1 3 Size:Youth 2X Large Vacuum Ports: 1 timed (spark) port Included in this header's long list of applications is 1999 2006 Chevy GMC 1 2 to 1 Ton 2WD and 4WD Silverado