860-230-2202 ARP Pressure Plate Bolts – Chevy
Engineered for your special application, ARP pressure plate bolt kits are the finest available and feature a large diameter, low profile head. Includes hardened washers. ARP High Performance Series bolts are made from a premium grade chrome moly and hardened to a nominal tensile strength of 180,000 psi. The Pro Series bolts, originally developed for NASCAR competition, are stronger and rated at 200,000 psi. 6/pkg.
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221-100 DriveGuardian Kit, NXT Damper Plate/DriveGuard
Direct replacement for the factory NXT damper plate with a 1.375” shaft that has 26 splines. Heavy duty design with 8 springs and a solid backing plate that can withstand more torque than the OEM units.
DriveGuardian NXT is a patented device that improves the reliability of your NXT transmissions and drives. DriveGuardian reduces the torque spikes that are created each time the propeller becomes aerated or exits, and then re-enters the water after hitting a wave. These spikes are generated by the inertia of the rotating engine components and have been measured to be 2X-4X the actual torque output of the engine. These torque spikes far exceed the manufacturer’s torque rating for the NXT transmission and drive, which can lead to broken gears and twisted shafts. DriveGuardian is a torque-limiting clutch that absorbs the damaging torque spikes and protects your entire drivetrain. DriveGuardian has been proven on the racecourse with numerous National and World Championships in offshore powerboat racing.
This is a Packaged Price Deal
Make sure to fill out this calibration questionnaire when ordering.
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221-1030 DriveGuardian NXT
DriveGuardian NXT is a patented device that improves the reliability of your NXT transmissions and drives. DriveGuardian reduces the torque spikes that are created each time the propeller becomes aerated or exits, and then re-enters the water after hitting a wave. These spikes are generated by the inertia of the rotating engine components and have been measured to be 2X-4X the actual torque output of the engine. These torque spikes far exceed the manufacturer’s torque rating for the NXT transmission and drive, which can lead to broken gears and twisted shafts. DriveGuardian is a torque-limiting clutch that absorbs the damaging torque spikes and protects your entire drivetrain. DriveGuardian has been proven on the racecourse with numerous National and World Championships in offshore powerboat racing.
Prior to shipment, each DriveGuardian is mounted to a specially built dyno and load tested to ensure they meet strict manufacturing standards. Your DriveGuardian is then calibrated for your specific engine and drive combination.
DriveGuardian is manufactured using billet aluminum housings and Kevlar clutch plates. The clutch plates are replaceable and the typical rebuild interval for an offshore performance application is 500-600 hours. DriveGuardian NXT retains the OEM damper plate and is a direct bolt-on with no additional modifications required. Includes a 1-year Manufacturer Warranty.
Make sure to fill out this calibration questionnaire when ordering.
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221-1035 DriveGuardian SCS Crashbox, Top Mount Starter
DriveGuardian SCS is a patented device that improves the reliability of your drives. DriveGuardian reduces the torque spikes that are created each time the propeller becomes aerated or exits, and then re-enters the water after hitting a wave. These spikes are generated by the inertia of the rotating engine components and have been measured to be 2X-4X the actual torque output of the engine. While the SCS Crashbox has been proven to be nearly indestructible but these torque spikes can easily exceed the ratings of your drive and lead to broken gears and twisted shafts. DriveGuardian is a torque-limiting clutch that absorbs the damaging torque spikes and protects your entire drivetrain. DriveGuardian has been proven on the racecourse with numerous National and World offshore powerboat racing Championships.
Prior to shipment, each DriveGuardian is mounted to a specially built dyno and load tested to ensure they meet strict manufacturing standards. Your DriveGuardian is then calibrated for your specific engine and drive combination.
DriveGuardian is manufactured using billet aluminum housings, Kevlar clutch plates and include a heavy duty 8-spring damper plate. DriveGuardian replaces the factory flywheel and damper plate assembly and is available for either top or bottom mount starters. Standard units are neutral balance for crankshafts with two-piece rear main seals. Other combinations are available upon request. Installation is a direct bolt-on with no additional modifications required. Includes a 1-year Manufacturer Warranty.
Make sure to fill out this calibration questionnaire when ordering.
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This Part has options, please click the button below to order.
221-102 + Option(s) SSM Borg Warner 1.375 x 26
DriveGuardian SSM is a patented device that improves the reliability of your transmissions and drives. DriveGuardian reduces the torque spikes that are created each time the propeller becomes aerated or exits, and then re-enters the water after hitting a wave. These spikes are generated by the inertia of the rotating engine components and have been measured to be 2X-4X the actual torque output of the engine. These torque spikes can easily exceed the ratings of your drivetrain components and lead to overheated transmissions, broken gears and twisted shafts. DriveGuardian is a torque-limiting clutch that absorbs the damaging torque spikes and protects your entire drivetrain. DriveGuardian has been proven on the racecourse with numerous National and World Championships in offshore powerboat racing.
Prior to shipment, each DriveGuardian is mounted to a specially built dyno and load tested to ensure they meet strict manufacturing standards. Your DriveGuardian is then calibrated for your specific engine and drive combination.
DriveGuardian is manufactured using billet aluminum housings, Kevlar clutch plates and include a heavy duty 8-spring damper plate. DriveGuardian replaces the factory flywheel and damper plate assembly and is available for either top or bottom mount starters. Standard units are neutral balance for crankshafts with two-piece rear main seals. Other combinations are available upon request. Installation is a direct bolt-on with no additional modifications required. Includes a 1-year Manufacturer Warranty.
Top or Bottom Mount Available
Make sure to fill out this calibration questionnaire when ordering.
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221-1015 Replaces Stock Coupler
DriveGuardian is a patented device that reduces the leading cause of pitted/broken gears and twisted shafts in Bravo sterndrives. DriveGuardian replaces the factory Bravo rubber coupler with a multi-plate torque-limiting clutch that is calibrated to your specific application. The cause of many gear and shaft failures is the enormous torque spike that is generated each time the propeller either partially or fully leaves the water, and then is re-submerged. These spikes are generated by the inertia of the rotating engine components and can be 2X-4X the actual torque output of the engine. Each spike lasts only a fraction of a second and throttling alone cannot eliminate them. Every spike causes stress to the gears and shafts which greatly reduces their usable life.
DriveGuardian has been proven on the racecourse with numerous National and World Championships in offshore powerboat racing.
Prior to shipment, each DriveGuardian is mounted to a specially built dyno and load tested to ensure they meet strict manufacturing standards. Your DriveGuardian is then calibrated for your specific engine and drive combination.
DriveGuardian is manufactured with billet aluminum housings and Kevlar clutch plates. DriveGuardian replaces the stock rubber coupler and installation is a direct bolt-on with no additional modifications required. Includes a 1-year Manufacturer Warranty.
Make sure to fill out this calibration questionnaire when ordering.
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221-1005 Heavy Duty Crashbox Damper Plate
- 13-1/2 outside diameter mounting plate.
- plate is .100 thick.
- smaller bolt pattern: (8) 3/8 holes on 9" bolt circle
- larger bolt pattern: (12) 3/8 holes on 12-5/8 bolt circle
- part is 1-1/2 overall thickness
- 2" x 10 Spline
Heavy Duty damper plate with eight cryo-treated springs and chrome moly backing plate. Built to withstand the extreme HP and torque of today’s high performance engines.
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221-1007 Heavy Duty Mercury 1075 Damper / Drive Plate
New 1075 Mercury HP direct replacement damper plate with dual bolt patterns, eight cryo-treated springs and 26 spline chromoly hub and backing plate. Built to withstand the extreme HP and torque of today’s high performance engines. Replaces OEM # 8M0050119, 842554A1. This will fit both 755-8602 top mount, neutral balanced steel flywheel as well as stock Mercury flywheel
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221-1006 Heavy Duty Mercury 1350 / 1650 Damper / Drive Plate
Direct replacement for the factory Mercury Racing 1350/1650 QC4V Damper plate with a 1.375” shaft that has 26 splines. Heavy duty design with 8 cryo-treated springs and a chromoly backing plate and hub that can withstand significantly more torque than the OEM units. Replaces OEM #8M0058750
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221-1010 Heavy Duty NXT Damper Plate
NXT direct replacement Hi-Performance drive plate rated for 2,000 ft-lbs Chromoly hubs and Cryo treated springs. 1.375" 26 spline. HRS-A36 Plate.
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220-96116 High Performance Damper Plate
Heavy Duty - Similar to the standard duty but designed to take the punishment of a high performance engine. 26 Spline.
- Overall Dia.: 13-1/4"
- Spring Housing: 7-1/8"
- Outer Lip: 9-1/2"
- Inner Dia: 1-1/4"
- Spline: 26
- Thickness: 1-1/16"
OEM: Drive Plate Mercury 816618
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676-18-4620 Additional Details:
Interchanges/ReplacesMalloryMercury Marine- 743-3193A2
- 743-3193A4
- 743-5172A6
- 780-9229A7
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676-18-4623 Additional Details:
Interchanges/ReplacesGLMMalloryMercury Marine
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676-18-4626 Additional Details:
Interchanges/ReplacesGLMMalloryMercury Marine- 2704-821896A2
- 2704-821896A6
- 2704-826191A4
- 2704-826191A6
- 2704-826191T4
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676-18-4639 Additional Details:
Interchanges/ReplacesMalloryMercury Marine- 2705-822066A3
- 2705-822066A5
- 2705-822066A7
- 2705-822066T7
- 700-858294T1
- 700-858294T14
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220-96115 Standard Duty Damper Plate
Standard Duty - These plates contain damper springs similar to a car clutch
disc. These springs take the shock out of the shift. Not recommended
for high performance applications.
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755-8641 TITAN Dampener Plate / Aluminum Flywheel Combo for GM up to 1600HP Description GM Big Block
Hardin Marine has again elevated the level of performance drive train options. Until now the industry has been limited by the fact that the largest damper plate available was rated at merely a 1000 ft lbs. While this has been used by many boats with more power than that its also has been the cause of horrific failures and product/trans damage.
This new drive plate combo take the same technology used to build the OEM 1650 HP Turbo QV4's drive plates and mates it to a proprietary flywheel assembly that retrofits to a traditional Big Block Chevrolet engine family.
So if your building an engine that makes monster power this is the solution to harnessing that horsepower and torque
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755-8640 TITAN Dampener Plate / Steel Flywheel Combo for GM up to 1600HP Description GM Big Block
Hardin Marine has again elevated the level of performance drive train options. Until now the industry has been limited by the fact that the largest damper plate available was rated at merely a 1000 ft lbs. While this has been used by many boats with more power than that its also has been the cause of horrific failures and product/trans damage.
This new drive plate combo take the same technology used to build the OEM 1650 HP Turbo QV4's drive plates and mates it to a proprietary flywheel assembly that retrofits to a traditional Big Block Chevrolet engine family.
So if your building an engine that makes monster power this is the solution to harnessing that horsepower and torque
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221-1022
- Made in the USA, patent pending
- Anodized billet aluminum for maximum corrosion resistance, even in saltwater environments.
- 100% rebuildable
- Direct replacement for the OEM coupler, zero modifications required.
- Chromoly splines that are stronger than the OEM coupler and can be replaced (for less $$ than purchasing a replacement OEM coupler) when required.
- Replaceable Polyurethane dampeners with external wear indicator
- Rated for 1,000+HP
- Perfect for diesel engines and applications that see extended idling (which is a common issue for the OEM coupler).
- Unlike the OEM coupler, will not break loose and spin if the dampening material fails (Get Home Mode)
- Two year warranty
- Replaces Mercruiser # 8M0098795, 861523A18, and 861523A9
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221-1023
- Includes 2 Polyurethane dampeners and 1 spline hub.
- Used on 221-1022 Drive Couplers ONLY!
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