SMALL BLOCK CHEVY
BIG BLOCK CHEVY
FORD
MOPAR
BUICK
NHRA
LS1, LS6, Z06, 5.7L, 6.0L    F.S.R.

Our New FSR (Forged Side Relief) slipper forging design allows the use of the most popular stroke and rod combinations while eliminating reluctor wheel clearence problems (see photo). Lightweight and extremely durable, these pistons are machined for 1.5, 1.5, 3mm rings and have an inverted dome designed to achieve optimum compression ratio with forced induction applications (CR calculated with .042 gasket thickness and 0.00" deck clearence).

Includes:
Pin #927-2250-15-51C (111g)
Wire locks #927-073-MW

350 Series
Std Bore: 3.900"-5.7L, 4.000"-6.0L
Ring package designed for: 1.5, 1.5, 3MM Rings
 Tech and Installation Tips
 Valve Relief Diagram
Part # Cubic
Inches		 Bore Stroke Rod
Length		 Block
Height		 Compression
Distance
Head Cubic Centimeters
64cc 66cc 72cc
Compression Ratio
Dome
Volume		 Gram
Weight		 Footnote Oversize
243016 403 4.005 4.000 6.125 9.240 1.115 11.6 11.3 10.6 -5.0 402 B, C 0.005
243017 408 4.030 4.000 6.125 9.240 1.115 11.7 11.4 10.7 -5.0 410 B, C 0.030
221176 408 4.030 4.000 6.125 9.240 1.115 9.2 9.0 8.6 -29.0 395 B, C 0.030
221178 414 4.060 4.000 6.125 9.240 1.115 9.3 9.1 8.7 -29.0 400 B, C 0.060
243018 427 4.125 4.000 6.125 9.240 1.115 12.1 11.9 11.1 -5.0 440 B, C STD LS7
221180 427 4.125 4.000 6.125 9.240 1.115 9.5 9.3 8.9 -29.0 425 B, C STD LS7
264041 383 3.905 4.000 6.125 9.240 1.115 10.5 10.3 9.7 -10 382 B, C 0.005
264042 403 4.005 4.000 6.125 9.240 1.115 11.0 10.7 10.1 -10 407 B, C 0.030
261043 408 4.030 4.000 6.125 9.240 1.115 11.1 10.8 10.2 -10 418 B, C 0.030


- Denotes part # has been issued a new part #. A list referencing old part #s to their new counterparts will be available shortly.

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