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SMALL BLOCK CHEVY
BIG BLOCK CHEVY
FORD
MOPAR
BUICK
NHRA
F.S.R. RACE PISTONS

These pistons are designed using our FSR (Forged Side Relief) forgings featuring internal and external cavities to minimize weight while providing a more rigid construction. The FSR design reduces skirt width helping to minimize piston contact with the cylinder wall that can cause friction and power loss. With thousands of race miles logged in the most demanding applications like NASCAR and the IRL, these pistons provide the ultimate combination of low friction lightweight design with increased stability and strength. (Tech note: In extreme horsepower applications the use of oil squirters may be required)

Includes:
Contact reduction grooves
927-2250-15-51C pin
Pin fitting and wire locks
Double pin oilers
Lateral Gas Ports
Accumulator Groove

ALL PRO 13º/GB2000 - FSR SERIES
Std Bore: 4.125
Ring package designed for: .043, 1/16, 3MM Rings

 Tech and Installation Tips
 Valve Relief Diagram
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
45cc 50cc 55cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
218582 414 4.125 3.875 6.000 9.000 1.062 16.3 15.1 14.0 -1.0 447 M,B std J76008-4125-5
218583 414 4.130 3.875 6.000 9.000 1.062 16.4 15.1 14.0 -1.0 450 M,B 0.005 J76008-4130-5
218580 406 4.125 3.800 6.000 9.000 1.100 16.3 15.0 13.9 0.0 456 M,B std J76008-4125-5
218581 406 4.125 3.800 5.850 9.000 1.250 16.3 15.0 13.9 0.0 480 M std J76008-4125-5

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