fits  17-24 M8 with 107″ engines

Forged Super Duty series for the Milwaukee Eight engine. With hard anodized crown and top ring groove to reflect heat and prevent ring to groove ‘micro-welding’. The Line2Line abradable self-lubricating powder coating technique allows zero tolerance installation, final tolerance will be 0.003″. The piston creates its own perfect tolerance during run-in, the coating automatically gives the tightest possible & perfect piston to cylinder fit for no piston rock and best possible ring seal. Note: Fits 107″ M8 engines. Works with stock 4.375″ stroke and stock unmodified heads. Aftermarket 4.25″ bore cylinders are required. – 11.4:1 CR – Piston weight: OEM – Engine displacement: 124″ – Bore: 4.25″ – Stroke: 4.375″ (stock 107″ engine) – Ring pack: 1.5mm, 1.5mm, 3.0mm – Top land: .230 – Pin number: .9270×2.250x.180-SCR415H – Pin type: Floating – Pin diameter: .927″ – Compression height: 1.155″ – Crown Type: Dome – Crown (cc): -2cc – Alloy: Forged 4032 Alloy

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Home > Parts > Engine > Top End > Pistons > KB, M8 107″ to 124″ big bore conversion piston kit. STD

fits  17-24 M8 107″ engines

Forged Super Duty series for the Milwaukee Eight engine. With hard anodized crown and top ring groove to reflect heat and prevent ring to groove ‘micro-welding’. The Line2Line abradable self-lubricating powder coating technique allows zero tolerance installation, final tolerance will be 0.003″. The piston creates its own perfect tolerance during run-in, the coating automatically gives the tightest possible & perfect piston to cylinder fit for no piston rock and best possible ring seal. Note: Fits 107″ M8 engines. Works with stock 4.375″ stroke and stock unmodified heads. Aftermarket 4.25″ bore cylinders are required. – 11.4:1 CR – Piston weight: OEM – Engine displacement: 124″ – Bore: 4.25″ – Stroke: 4.375″ (stock 107″ engine) – Ring pack: 1.5mm, 1.5mm, 3.0mm – Top land: .230 – Pin number: .9270×2.250x.180-SCR415H – Pin type: Floating – Pin diameter: .927″ – Compression height: 1.155″ – Crown Type: Dome – Crown (cc): -2cc – Alloy: Forged 4032 Alloy

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Home > Parts > Engine > Top End > Pistons > KB, M8 107″ to 124″ big bore conversion piston kit. +.005 > KB, M8 107″ to 124″ big bore conversion piston kit. +.005

fits  17-24 114″117″ M8 engines

Forged Super Duty series for the Milwaukee Eight 114″ and 117″ engine for a 128″ big bore conversion. Designed to work with both oil/water cooled engines and up to 3mm larger valves. With hard anodized crown and top ring groove to reflect heat and prevent ring to groove ‘micro-welding’. The Line2Line abradable self-lubricating powder coating technique allows zero tolerance installation, final tolerance will be 0.003″. The piston creates its own perfect tolerance during run-in, the coating automatically gives the tightest possible & perfect piston to cylinder fit for no piston rock and best possible ring seal. Note: Fits 114/117″ M8 engines with stock 4.5″ stroke. Aftermarket 4.25″ bore cylinders are required. For up to 3mm larger valves. – Compression ratio: 11.7:1 – Engine displacement: 128″ – Bore: 4.25″ – Stroke: 4.5″ – Ring Pack: 1.5mm, 1.5mm, 3.0mm – Top land: 0.23 – Pin Number: .927×2.250x.180c-SCR415H – Pin type: Floating – Pin Diameter: 0.927″ – Lock: BR8894-1 – Compression height: 1.083″ – Crown type: Dome – Crown (cc): -2.5 – Alloy: Forged 4032 alloy

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Home > Parts > Engine > Top End > Pistons > KB, M8 114″/117″ to 128″ big bore conversion piston kit. STD

fits  17-24 114″117″ M8 engines

Forged Super Duty series for the Milwaukee Eight 114″ and 117″ engine for a 128″ big bore conversion. Designed to work with both oil/water cooled engines and up to 3mm larger valves. With hard anodized crown and top ring groove to reflect heat and prevent ring to groove ‘micro-welding’. The Line2Line abradable self-lubricating powder coating technique allows zero tolerance installation, final tolerance will be 0.003″. The piston creates its own perfect tolerance during run-in, the coating automatically gives the tightest possible & perfect piston to cylinder fit for no piston rock and best possible ring seal. Note: Fits 114/117″ M8 engines with stock 4.5″ stroke. Aftermarket 4.25″ bore cylinders are required. For up to 3mm larger valves. – Compression ratio: 11.7:1 – Engine displacement: 128″ – Bore: 4.25″ – Stroke: 4.5″ – Ring Pack: 1.5mm, 1.5mm, 3.0mm – Top land: 0.23 – Pin Number: .927×2.250x.180c-SCR415H – Pin type: Floating – Pin Diameter: 0.927″ – Lock: BR8894-1 – Compression height: 1.083″ – Crown type: Dome – Crown (cc): -2.5 – Alloy: Forged 4032 alloy

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Home > Parts > Engine > Top End > Pistons > KB, M8 114″/117″ to 128″ big bore conv. piston kit. +.005″

fits  17-23 M8

Forged Super Duty series for the Milwaukee Eight engine. With hard anodized crown and top ring groove to reflect heat and prevent ring to groove ‘micro-welding’. The Line2Line abradable self-lubricating powder coating technique allows zero tolerance installation, final tolerance will be 0.003″. The piston creates its own perfect tolerance during run-in, the coating automatically gives the tightest possible & perfect piston to cylinder fit for no piston rock and best possible ring seal. Note: Fits 114/117″ M8 engines, cylinder must be bored to 4.125″ big bore size. Case boring is not required, OEM weight so rebalancing is not required and works with stock 4.500″ stroke. 10.9:1 CR. (with 88.6cc head volume). Piston weight: OEM. Piston pin weight 115gr., offset: 0.025″. Piston: +1.9cc/Flat top. Compression height: 1.083″. Ring pack: 1.2mm 1.2mm 3.0mm. Bore 4 1/8″ / Stroke stock 4.500″.

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Home > Parts > Engine > Top End > Pistons > KB, M8 114/117 to 120″ big bore conv. piston set. STD

fits  17-23 M8

Forged Super Duty series for the Milwaukee Eight engine. With hard anodized crown and top ring groove to reflect heat and prevent ring to groove ‘micro-welding’. The Line2Line abradable self-lubricating powder coating technique allows zero tolerance installation, final tolerance will be 0.003″. The piston creates its own perfect tolerance during run-in, the coating automatically gives the tightest possible & perfect piston to cylinder fit for no piston rock and best possible ring seal. Note: Fits 114/117″ M8 engines, cylinder must be bored to 4.125″ big bore size. Case boring is not required, OEM weight so rebalancing is not required and works with stock 4.500″ stroke. 10.9:1 CR. (with 88.6cc head volume). Piston weight: OEM. Piston pin weight 115gr., offset: 0.025″. Piston: +1.9cc/Flat top. Compression height: 1.083″. Ring pack: 1.2mm 1.2mm 3.0mm. Bore 4 1/8″ / Stroke stock 4.500″.

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Home > Parts > Engine > Top End > Pistons > KB, M8 114/117 to 120″ big bore conv. piston set. +.010″

fits  17-23 M8

Forged Super Duty series for the Milwaukee Eight engine. With hard anodized crown and top ring groove to reflect heat and prevent ring to groove ‘micro-welding’. The Line2Line abradable self-lubricating powder coating technique allows zero tolerance installation, final tolerance will be 0.003″. The piston creates its own perfect tolerance during run-in, the coating automatically gives the tightest possible & perfect piston to cylinder fit for no piston rock and best possible ring seal. Note: Fits 114/117″ M8 engines, cylinder must be bored to 4.125″ big bore size. Case boring is not required, OEM weight so rebalancing is not required and works with stock 4.500″ stroke. 10.9:1 CR. (with 88.6cc head volume). Piston weight: OEM. Piston pin weight 115gr., offset: 0.025″. Piston: +1.9cc/Flat top. Compression height: 1.083″. Ring pack: 1.2mm 1.2mm 3.0mm. Bore 4 1/8″ / Stroke stock 4.500″.

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Home > Parts > Engine > Top End > Pistons > KB, M8 114/117 to 120″ big bore conv. piston set. +.020″

fits  17-23 M8

Forged Super Duty series for the Milwaukee Eight engine. With hard anodized crown and top ring groove to reflect heat and prevent ring to groove ‘micro-welding’. The Line2Line abradable self-lubricating powder coating technique allows zero tolerance installation, final tolerance will be 0.003″. The piston creates its own perfect tolerance during run-in, the coating automatically gives the tightest possible & perfect piston to cylinder fit for no piston rock and best possible ring seal. Note: Fits 114/117″ M8 engines, cylinder must be bored to 4.125″ big bore size. Case boring is not required, OEM weight so rebalancing is not required and works with stock 4.500″ stroke. 10.9:1 CR. (with 88.6cc head volume). Piston weight: OEM. Piston pin weight 115gr., offset: 0.025″. Piston: +1.9cc/Flat top. Compression height: 1.083″. Ring pack: 1.2mm 1.2mm 3.0mm. Bore 4 1/8″ / Stroke stock 4.500″.

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Home > Parts > Engine > Top End > Pistons > KB, M8 114/117 to 120″ big bore conv. piston set. +.030″

fits  17-23 M8

Forged Super Duty series for the Milwaukee Eight engine. With hard anodized crown and top ring groove to reflect heat and prevent ring to groove ‘micro-welding’. The Line2Line abradable self-lubricating powder coating technique allows zero tolerance installation, final tolerance will be 0.003″. The piston creates its own perfect tolerance during run-in, the coating automatically gives the tightest possible & perfect piston to cylinder fit for no piston rock and best possible ring seal. Note: Fits 114/117″ M8 engines, cylinder must be bored to 4.125″ big bore size. Case boring is not required, OEM weight so rebalancing is not required and works with stock 4.500″ stroke. 10.9:1 CR. (with 88.6cc head volume). Piston weight: OEM. Piston pin weight 115gr., offset: 0.025″. Piston: +1.9cc/Flat top. Compression height: 1.083″. Ring pack: 1.2mm 1.2mm 3.0mm. Bore 4 1/8″ / Stroke stock 4.500″.

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Home > Parts > Engine > Top End > Pistons > KB, M8 114/117 to 120″ big bore conv. piston set. +.040″

fits  99-06 88″ Twin Cam (NU)

88″ (3-3/4″) to 95″ (3-7/8″) big bore conversion forged piston set. 9.25:1 CR with 85cc head. Piston weight 350gr. Piston pin weight 89gr. Piston pin dia. .927″ / offset. Head type: Dome with -6.7cc. Compression height 1.263″. Bore 3.875″. Stroke 4.000″. Rod length 7.667″. Cyl. length 4.938″. All KB forged pistons are made from 4032 alloy, a 11% silicon alloy that is formed in a forging press. Forging aluminum gives a superior strength and structural integrity on a molecular level, after which it is fully machined. The combination of this alloy and the forging process allows the piston to flex under detonation, or pre-ignition, giving the best resistance to cracking. Although 4032 has a low expansion rate, it is higher than the cast Hypereutectic. Therefore forged KB pistons will require about .001″ wider piston to wall clearance. Pistons are sold as sets, complete with wrist pin retaining rings, wrist pins and piston rings. Note: All KB forged pistons come equipped with offset wrist pins / piston pins. There is a front and rear section on the piston and it is necessary to install it in the correct way. Please refer to the installation instructions, as provided with each piston set, prior to installation.

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Home > Parts > Engine > Top End > Pistons > Piston & Cylinder Kits > KB Performance, 88″ to 95″ Twin Cam piston kit. STD