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Top End Components

Unlock the hidden potential of your engine with powerful Top End upgrades from Zipper’s Performance Products. Zipper’s Performance keeps specially CNC-machined heads in stock for super-quick turnaround (on an exchange basis) for Twin Cam® and Sportster® engines. Twin Cam® big bore cylinder conversions for 88 to 95” and 98″ plus 96 to 103” and 107″ fitted with forged pistons in many different compression ratios for fast turnaround or exchange. Zipper’s Performance also stocks pistons, valves, guides, valve spring kits, and other critical top end parts from the industry’s most renowned manufacturers.

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Zipper’s '99-'06 Twin Cam® Blueprinted Big Bore Cylinder Kits
Zipper’s '99-'06 Twin Cam® Blueprinted Big Bore Cylinder Kits
5.00 out of 5
Zipper’s '07-Up Twin Cam® Blueprinted Big Bore Cylinder Kits
Zipper’s '07-Up Twin Cam® Blueprinted Big Bore Cylinder Kits
Zipper's Milwaukee-Eight® Exchange Cylinder Kits
Zipper's Milwaukee-Eight® Big Bore Cylinder Kits
Zipper's 124” Stroker Big Bore Kit for 1999-Up Twin Cam® Engines
Zipper's 124” Stroker Big Bore Kit for 1999-Up Twin...
Zipper's 117” Stock Stroke-Big Bore Kit For 2007-Up Engines
Zipper's 117” Stock Stroke-Big Bore Kit For 2007-Up Engines
Zipper's Muscle 124" Kit for 2017-2019 107" Milwaukee-Eight® Models
Zipper's Muscle 124" Kit for 2017-2019 107" Milwaukee-Eight® Models
Zipper's Muscle 117" Kit for 2017-2019 107" Milwaukee-Eight® Models
Zipper's Muscle 117" Kit for 2017-2019 107" Milwaukee-Eight® Models
Zipper's Sleeper 117" Kit for 2017-up 107" Milwaukee-Eight® Models
Zipper's Sleeper 117" Kit for 2017-up 107" Milwaukee-Eight® Models
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.001 MANGANESE M8 EXH GUIDE
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.005 4.25 X 4.375 STROKE M8 PISTON KIT
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.005 4.25 X 4.500 STROKE M8 FLAT TOP PISTONS
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.560" M8 BEEHIVE SPRING KT (MOLY STEEL)
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.600-7MM BEEHIVE SPRING KIT MOLY STEEL
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CP CARRILLO .010 CVO 110 FLATOP PISTON KIT
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KB .005 EV 80 10.5:1 PISTON KIT
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KB .005 EV80 FLAT TOP PISTON KIT
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KB .005 KB TC 103 10.5:1 PISTON KIT
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KB .005 KB TC 110 FLAT TOP PISTON KIT
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KB .005 KB TC 4.062 113 FLAT TOP PISTON...
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KB .005 KB TC 95 10:1 PISTON KIT
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KB .005 KB TC 95 FLAT TOP PISTON KT
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KB .005 TC 110 +4.2CC DOME PISTON KIT
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KB .005 TC 95 10.5:1 PISTON KIT
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KB .010 EV 80 10.5:1 PISTON KIT
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KB .010 KB TC 103 10.5:1 PISTON KIT
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KB .010 TC 103 FLAT TOP PISTON KIT
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KB .010 TC 110 +4.2CC DOME PISTON KIT
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KB .010 TC 95 10.5:1 PISTON KIT
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KB .020 KB TC 103 10.5:1 PISTON KIT
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KB .020 KB TC 95 10.5:1 PISTON KIT
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KB .020 TC 110 +4.2CC DOME PISTON KIT
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KB 3.937 TC 107 FLAT TOP PISTON KIT
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KB STD 103 FLAT TOP PISTON KIT
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KB STD TC 103 10.5:1 PISTON KIT
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KB STD TC 110 +4.2CC DOME PISTON KIT
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KB STD TC 95 10:1 PISTON KIT

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