2021-22 Circle Track Catalog

Power Pak Flat-Top Piston Kits

Power Pak Plus 2bbl Flat-Top Piston Kits NEW!

)RUJHGÀDWWRSSLVWRQVZLWKUDGLXVHG valve pockets use 1.5mm top, 1.5mm second, and 3.0mm oil rings (unless spec- L¿HG6HWVRIHLJKWZLWKZULVWSLQVORFNV and performance piston rings.

Engineered exclusively for use in 2bbl-powered, small block Chevy UDFHHQJLQHV¿WWHGZLWK F\OLQGHUKHDGVIRUJHGÀDWWRSSLVWRQV feature coated skirts, lateral gas ports and asymmetrical valve pockets. Pistons are machined for 1.0mm top and 1.0mm second compression,

Rod Length

Comp. Height

Dome Volume

Comp. Ratio

Part No.

Bore

Stroke

Small Block Chevy MAH930200030 4.030" 3.48"/3.50" 5.700" 1.550" -5cc 10.6:1 MAH930203630* 4.030" 3.48"/3.50" 5.700" 1.550" -5cc 10.6:1 MAH930200330 4.030" 3.48"/3.50" 6.000" 1.250" -5cc 10.6:1 MAH930200630 4.030" 3.48"/3.50" 6.125" 1.125" -5cc 10.6:1 MAH930200130 4.030" 3.750" 5.700" 1.425" -5cc 11.1:1 MAH930203640*† 4.040" 3.48"/3.50" 5.700" 1.550" -5.0cc 10.3:1 MAH930200040 4.040" 3.48"/3.50" 5.700" 1.550" -5cc 10.6:1 MAH930200340 4.040" 3.48"/3.50" 6.000" 1.250" -5cc 10.6:1 MAH930200140 4.040" 3.750" 5.700" 1.425" -5cc 11.1:1 MAH930202640 4.040" 3.500" 6.000" 1.250" -4cc 10.6:1 MAH930202640 4.040" 3.480"/3.50" 5.700" 1.550" -5cc 10.5:1 MAH930200360 4.060" 3.48"/3.50" 6.000" 1.250" -5cc 10.6:1 MAH930208825 4.125" 4.000" 6.000" 1.000" -5cc 12.3:1 MAH930208225 4.125" 3.480"/3.50" 6.125" 1.125" 11cc 13.4:1 MAH930200755 4.155" 3.500" 6.125" 1.125" -5cc 11.0:1 Small Block Chevy Gen. IV LS7 (Compatible with LS7 Style Cyl. Heads) MAH930221625† 4.125" 4.000" 6.125" 1.105" -2.5cc 12.6:1 Small Block Ford MAH930244130 4.030" 3.000" 5.090" 1.600" -6.6cc 9.0:1 MAH930244730 4.030" 3.400" 5.400" 1.090" -6.6cc 10.0:1 MAH930244732† 4.032" 3.400" 5.400" 1.090" -6.5cc 10.0:1 MAH930244735 4.035" 3.400" 5.400" 1.090" -6.00cc 10.1:1 MAH930244745† 4.045" 3.400" 5.400" 1.090" -6.5cc 10.1:1 MAH930244740 4.040" 3.400" 5.400" 1.090" -6.6cc 10.0:1 MAH930244140 4.040" 3.000" 5.090" 1.600" -6.5cc 9.6:1 MAH930244825† 4.125" 3.400" 5.400" 1.090" -6.5cc 10.4:1 MAH930244425 4.125" 3.500" 6.200" 1.245" -6.5cc 12.4:1 * Signifies pistons with 4-valve pocket design. In addition to the rod and stroke combinations listed with each part number, other rod/stroke com- binations may work. Small block Chevy and small block Ford compression ratios are based on a 64cc combustion chamber. † Signifies pistons machined to accept 1mm top, 1mm second and 2mm oil rings. Power Pak Plus 21° Flat- Top Piston Kits NEW! Engineered exclusively for use in VPDOOEORFN&KHY\V¿WWHGZLWK'DUW 49cc cylinder heads or other 21° angle PLOOHGKHDGVIRUJHGÀDWWRSSLVWRQV feature coated skirts, lateral gas ports, and asymmetrical valve pockets. Pistons are machined for 1.0mm top and 1.0mm second compression, and 2.0mm oil rings. Sold complete with SLVWRQVZULVWSLQVORFNVDQGSHUIRUPDQFH¿OH¿WSLVWRQULQJV

and 2.0mm oil rings. Choose from high-output or lightweight versions. Sold complete with pistons, wrist pins, locks, and per- IRUPDQFH¿OH¿WSLVWRQULQJV

Rod Length

Comp. Height

Dome Volume

Comp. Ratio

Part No.

Bore

Stroke

Small Block Chevy High Output Pistons MAH930202530 4.030" 3.500" 5.700" 1.550" -4.1cc 10.6:1 MAH930202535 4.035" 3.500" 5.700" 1.550" -4.1cc 10.6:1 Small Block Chevy Lightweight Pistons MAH930206560 4.060" 3.500" 5.700" 1.550" -2.4cc 10.9:1 MAH930206630 4.030" 3.500" 6.000" 1.250" -2.4cc 10.8:1 Performance Piston Ring Sets Mahle performance piston rings, developed with inno- vative computer simulation and development tools, include barrel-faced, plasma moly/ductile iron top rings, cast iron reverse-twist second rings, and FRQYHQWLRQDOWKUHHSLHFHRLOULQJV6HWVOLVWHGUHTXLUH¿OH¿WWLQJ

Top Ring

2nd Ring

Oil Ring

Oil Ring Tension

Part No.

Bore

MAH4005MS-15 4.000" 1.5mm 1.5mm 3.0mm Standard MAH4035MS-112 4.030" 1.0mm 1.0mm 2.0mm Standard MAH4030MS 4.030” 1/16” 1/16” 3/16” Standard MAH4040MS-112 4.035" 1.0mm 1.0mm 2.0mm Standard MAH4045MS-112 4.040" 1.0mm 1.0mm 2.0mm Standard MAH4050ML-043 4.045” .043” .043” 3.0mm Low MAH4060MS-112 4.055" 1.0mm 1.0mm 2.0mm Standard MAH4065MS-112 4.060" 1.0mm 1.0mm 2.0mm Standard MAH4075MS-15 4.070" 1.5mm 1.5mm 3.0mm Standard MAH4130ML-043 4.125" .043" .043" 3.0mm Low MAH4130MS-112 4.125" 1.0mm 1.0mm 2.0mm Standard MAH4135MS-112 4.130" 1.0mm 1.0mm 2.0mm Standard MAH4140MS-112 4.135" 1.0mm 1.0mm 2.0mm Standard MAH4150MS-112 4.145" 1.0mm 1.0mm 2.0mm Standard MAH4160MS-112 4.155" 1.0mm 1.0mm 2.0mm Standard MAH4170ML-043 4.165" .043" .043" 3.0mm Low MAH4170MS-112 4.165" 1.0mm 1.0mm 2.0mm Standard MAH4175MS-112 4.170" 1.0mm 1.0mm 2.0mm Standard Lock'n Tool MAHW-927 Wrist pin lock insertion tool. Designed for use with .927" diameter wrist pin clips.

Rod Length

Comp. Height

Dome Volume

Comp. Ratio

Part No.

Bore

Stroke

Small Block Chevy MAH197724930 4.030" 3.500" 5.700" 1.550" -7.9cc 12.2:1 MAH197726830 4.030" 3.500" 6.000" 1.250" -8.9cc 12.0:1 MAH197726840 4.040" 3.500" 6.000" 1.250" -8.9cc 12.1:1 MAH197726860 4.060" 3.500" 6.000" 1.250" -8.9cc 12.2:1 MAH197726865 4.065" 3.500" 6.000" 1.250" -8.9cc 12.2:1 Note Compression ratios are based upon a 49cc combustion chamber.

Wrist Pin Lock Ring MAH6441489 Wrist pin C-clip without tang. Designed to retain .927" diameter wrist pins.

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CIRCLE TRACK 2021-22

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