396, 427, 454 Closed Chamber

Specifically designed for Naturally Aspirated 632 engines to fit the following cylinder heads: 12º Raptor, 12º Pro-Filer, Dart Big Chief 14º (program #'s 3815 & 384), Sonny Tru-Pro 14.5º, and Brodix PB1200. Precision CNC machined ring grooves are designed for .043 back-cut top rings, .043 D-wall 2nd rings, and 3.0mm oil rings. Compression distance and compression ratio calculated with zero deck clearance at listed block height.

Includes:

  • Pin #990-2930-18-51S (174g)
  • Double spiro locks (#990-042-CS) Rail Supports(# 4600-203)
  • Double Forced Pin Oilers, Accumulator Grooves, and Vertical gas ports for maximum top ring seal
Part # Brand Bore Stroke Rod Deck Head CC Comp. Ratio Comp. Height Crown Vol. Ring Set Head Type Stock Action
353420 JE Pistons 4.625 4.750 6.700 10.200 65.0 16.5 1.120 -7.30 JG86S8-4625-5 Flat Top Back Order
353420 JE Pistons 4.625 4.375 6.480 9.800 70.0 14.6 1.120 -7.30 JG86S8-4625-5 Flat Top Back Order
353420 JE Pistons 4.625 4.750 6.700 10.200 77.0 14.6 1.120 -7.30 JG86S8-4625-5 Flat Top Back Order
353420 JE Pistons 4.625 4.375 6.480 9.800 77.0 13.7 1.120 -7.30 JG86S8-4625-5 Flat Top Back Order
353420 JE Pistons 4.625 4.375 6.480 9.800 65.0 15.4 1.120 -7.30 JG86S8-4625-5 Flat Top Back Order
353420 JE Pistons 4.625 4.750 6.700 10.200 70.0 15.7 1.120 -7.30 JG86S8-4625-5 Flat Top Back Order
353418 JE Pistons 4.600 4.375 6.480 9.800 70.0 14.5 1.120 -7.30 JG86F8-4600-5 Flat Top In stock
353418 JE Pistons 4.600 4.375 6.480 9.800 65.0 15.2 1.120 -7.30 JG86F8-4600-5 Flat Top In stock
353418 JE Pistons 4.600 4.750 6.700 10.200 77.0 14.5 1.120 -7.30 JG86F8-4600-5 Flat Top In stock
353418 JE Pistons 4.600 4.750 6.700 10.200 70.0 15.5 1.120 -7.30 JG86F8-4600-5 Flat Top In stock
353418 JE Pistons 4.600 4.375 6.480 9.800 77.0 13.6 1.120 -7.30 JG86F8-4600-5 Flat Top In stock
353418 JE Pistons 4.600 4.750 6.700 10.200 65.0 16.4 1.120 -7.30 JG86F8-4600-5 Flat Top In stock
293520 JE Pistons 4.625 4.750 6.660 10.200 77.0 14.6 1.140 -7.30 JG73S8-4625-5 Flat Top Back Order
293520 JE Pistons 4.625 4.750 6.660 10.200 65.0 16.5 1.140 -7.30 JG73S8-4625-5 Flat Top Back Order
293520 JE Pistons 4.625 4.750 6.660 10.200 70.0 15.7 1.140 -7.30 JG73S8-4625-5 Flat Top Back Order
293518 JE Pistons 4.600 4.750 6.660 10.200 65.0 16.4 1.140 -7.30 JG73U8-4600-5 Flat Top In stock
293518 JE Pistons 4.600 4.750 6.660 10.200 77.0 14.5 1.140 -7.30 JG73U8-4600-5 Flat Top In stock
293518 JE Pistons 4.600 4.750 6.660 10.200 70.0 15.5 1.140 -7.30 JG73U8-4600-5 Flat Top In stock
280265 JE Pistons 4.610 4.750 6.700 10.200 65.0 16.5 1.120 -7.00 JG7708-4610-5 Flat Top In stock
280265 JE Pistons 4.610 4.750 6.700 10.200 70.0 15.6 1.120 -7.00 JG7708-4610-5 Flat Top In stock
280265 JE Pistons 4.610 4.750 6.700 10.200 77.0 14.5 1.120 -7.00 JG7708-4610-5 Flat Top In stock
293519 JE Pistons 4.610 4.750 6.660 10.200 70.0 15.6 1.140 -7.30 JG73F8-4610-5 Flat Top In stock
293519 JE Pistons 4.610 4.750 6.660 10.200 65.0 16.5 1.140 -7.30 JG73F8-4610-5 Flat Top In stock
293519 JE Pistons 4.610 4.750 6.660 10.200 77.0 14.5 1.140 -7.30 JG73F8-4610-5 Flat Top In stock
280266 JE Pistons 4.625 4.750 6.700 10.200 65.0 16.5 1.120 -7.00 JG7708-4625-5 Flat Top Back Order
280266 JE Pistons 4.625 4.750 6.700 10.200 77.0 14.6 1.120 -7.00 JG7708-4625-5 Flat Top Back Order
280266 JE Pistons 4.625 4.750 6.700 10.200 70.0 15.7 1.120 -7.00 JG7708-4625-5 Flat Top Back Order
353419 JE Pistons 4.610 4.750 6.700 10.200 65.0 16.5 1.120 -7.30 JG86H8-4610-5 Flat Top Back Order
353419 JE Pistons 4.610 4.375 6.480 9.800 70.0 14.5 1.120 -7.30 JG86H8-4610-5 Flat Top Back Order
353419 JE Pistons 4.610 4.375 6.480 9.800 65.0 15.3 1.120 -7.30 JG86H8-4610-5 Flat Top Back Order
353419 JE Pistons 4.610 4.750 6.700 10.200 70.0 15.6 1.120 -7.30 JG86H8-4610-5 Flat Top Back Order
353419 JE Pistons 4.610 4.750 6.700 10.200 77.0 14.5 1.120 -7.30 JG86H8-4610-5 Flat Top Back Order
353419 JE Pistons 4.610 4.375 6.480 9.800 77.0 13.6 1.120 -7.30 JG86H8-4610-5 Flat Top Back Order
280263 JE Pistons 4.600 4.750 6.700 10.200 77.0 14.5 1.120 -7.00 JG7708-4600-5 Flat Top In stock
280263 JE Pistons 4.600 4.750 6.700 10.200 70.0 15.5 1.120 -7.00 JG7708-4600-5 Flat Top In stock
280263 JE Pistons 4.600 4.750 6.700 10.200 65.0 16.4 1.120 -7.00 JG7708-4600-5 Flat Top In stock