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SMALL BLOCK CHEVY
BIG BLOCK CHEVY
FORD
MOPAR
BUICK
NHRA
4.6L / 5.4L MODULAR

These pistons are designed for 4.6/5.4L engines and are compatible with forced induction and nitrous applications. Low compression pistons feature our spherical dish for the ultimate in combustion efficiency. These pistons are race proven in turbo modular motors posting mid 6-second times in the 1/4 mile. 4.6L part numbers now include valve reliefs for either 3V or 4V heads as noted below. 5.4L part numbers have no valve reliefs. Accept 1.5, 1.5, 3.0mm rings.

Includes:
Pin #866-2500-15-51S (109g)
Double spiro locks (#866-042-CS)
Contact reduction grooves
Double pin oilers

4.6L 4V Flat Top
Std Bore: 3.552
Ring package designed for: 1.5, 1.5, 3MM Rings

 Tech and Installation Tips
 Valve Relief Diagram
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
42cc 46cc 52cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
257540 281 3.552 3.543 5.933 8.925 1.220 12.1 11.5 10.3 -3 NEW M STD J68008-3550-5
257541 284 3.572 3.543 5.933 8.925 1.220 12.2 11.6 10.4 -3 NEW 0.020 J68008-3570-5

4.6L 4V Dish
Std Bore: 3.552
Ring package designed for: 1.5, 1.5, 3MM Rings
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
42cc 45cc 52cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
257542 281 3.552 3.543 5.933 8.925 1.220 9.7 9.2 8.6 -17.0 NEW STD J68008-3550-5
257543 284 3.572 3.543 5.933 8.925 1.220 9.8 9.3 8.6 -17.0 NEW 0.020 J68008-3570-5
257544 281 3.552 3.543 5.933 8.925 1.220 10.7 10.2 9.3 -10.0 NEW M STD J68008-3550-5
257545 284 3.572 3.543 5.933 8.925 1.220 10.8 10.2 9.4 -10.0 NEW 0.020 J68008-3570-5

4.6L 3 VALVE FLAT TOP
Std Bore: 3.552
Ring package designed for: 1.5, 1.5, 3MM Rings
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
42cc 45cc 52cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
232468 281 3.552 3.543 5.933 8.933 1.220 12.7 11.8 10.7 -1.0 384 M STD J68008-3550-5
232469 284 3.572 3.543 5.933 8.933 1.220 12.8 11.9 10.8 -1.0 377 M 0.020 J68008-3570-5

4.6L 3 VALVE DISH
Std Bore: 3.552
Ring package designed for: 1.5, 1.5, 3MM Rings
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
42cc 45cc 52cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
232466 281 3.552 3.543 5.933 8.933 1.220 9.7 9.2 8.6 -17.0 375 M STD J68008-3550-5
232467 284 3.572 3.543 5.933 8.933 1.220 9.8 9.3 8.6 -17.0 379 M 0.020 J68008-3570-5

5.4L DISH (* Compression Ratio's for 5.4L Pistons are calculated with .120" deck clearance)
Std Bore: 3.552
Ring package designed for: 1.5, 1.5, 3MM Rings
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
42cc 45cc 52cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
227125 330 3.552 4.165 6.657 10.078 1.220 8.5 8.2 7.8 -21.0 409 * STD J68008-3550-5
227127 334 3.572 4.165 6.657 10.078 1.220 8.6 8.3 7.9 -21.0 385 * 0.020 J68008-3570-5
Did you know? - we also offer a complete line of pistons for this particular application in our SRP product line? Click here to check them out.
 
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