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F.S.R. TOUR SERIES GP (GAS PORTED)

The FSR Tour Series GP is a lightweight design specifically made for naturally aspirated circle track or drag race applications up to 650 HP. Ring package has been raised for maximum efficiency. These pistons are an aggressive, competition-only design. Not intended for street or nitrous use. Ring grooves are precision machined for .043, .043, 3.0mm rings. Valve reliefs will accommodate angle-milled aftermarket cylinder heads.

Includes:
Pin# 927-2350-15-51C (111g)
Wire Locks 927-073-MW
Lateral Gas Ports
Accumulator Groove
Double Pin Oilers
350 Series
Std Bore: 4.000
Ring package designed for: .043, .043, 3MM Rings
Tech and Installation Tips
Valve Relief Diagram
Part # CID Bore Stroke Rod
Lgth.		 Block
Ht.		 Comp.
Ht.
Head Cubic Centimeters
58cc 64cc 72cc
Compression Ratio
Dome
Vol.		 Gram
Wt.		 Footnote Oversize Recom.
Ring Set
258028 357 4.030 3.500 6.000 9.000 1.250 11.2 10.4 9.5 -5.0 366 A 0.030 J70008-4030-5
257797 357 4.030 3.500 5.700 9.000 1.550 11.2 10.4 9.5 -5.0 386 A 0.030 J70008-4030-5
281853 357 4.030 3.500 6.250 9.000 1.000 11.2 10.4 9.5 -5.0 340 A,B 0.030 J70008-4030-5
281848 357 4.030 3.500 6.125 9.000 1.125 11.2 10.4 9.5 -5.0 351 A 0.030 J70008-4030-5
281849 358 4.035 3.500 6.125 9.000 1.125 11.2 10.4 9.5 -5.0 352 A 0.035 J70008-4030-5
281854 358 4.035 3.500 6.250 9.000 1.000 11.2 10.4 9.5 -5.0 341 A,B 0.035 J70008-4030-5
258025 358 4.035 3.500 5.700 9.000 1.550 11.2 10.4 9.5 -5.0 389 A 0.035 J70008-4030-5
258029 358 4.035 3.500 6.000 9.000 1.250 11.2 10.4 9.5 -5.0 363 A 0.035 J70008-4030-5
258030 359 4.040 3.500 6.000 9.000 1.250 11.2 10.4 9.5 -5.0 366 A 0.040 J70008-4040-5
258026 359 4.040 3.500 5.700 9.000 1.550 11.2 10.4 9.5 -5.0 390 A 0.040 J70008-4040-5
281855 359 4.040 3.500 6.250 9.000 1.000 11.2 10.4 9.5 -5.0 343 A,B 0.040 J70008-4040-5
281851 359 4.040 3.500 6.125 9.000 1.125 11.2 10.4 9.5 -5.0 354 A 0.040 J70008-4040-5
281852 360 4.045 3.500 6.125 9.000 1.125 11.2 10.4 9.5 -5.0 355 A 0.045 J70008-4040-5
281856 360 4.045 3.500 6.250 9.000 1.000 11.2 10.4 9.5 -5.0 344 A,B 0.045 J70008-4040-5
258027 360 4.045 3.500 5.700 9.000 1.550 11.2 10.4 9.5 -5.0 391 A 0.060 J70008-4040-5
258031 362 4.045 3.500 6.000 9.000 1.250 11.3 10.5 9.6 -5.0 367 A 0.060 J70008-4040-5

- 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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