Product#: HD100012

396-427 Pro/Race All Steel 7.01" x 1.73" Internal Balance Race Harmonic Balancer

Pro/Race harmonic dampers are designed for a wide range of high performance applications. This "all steel" damper is direct replacements for factory cast iron versions which may fracture or disintegrate at high RPM and are...

Product#: HD100011

400ci Pro/Race All Steel 6.61" x 1.54" External Balance Race Harmonic Balancer

Pro/Race harmonic dampers are designed for a wide range of high performance applications. This "all steel" damper is direct replacements for factory cast iron versions which may fracture or disintegrate at high RPM and are...

Product#: HD100014

283-350 with Supercharger Pro/Race All Steel 6.61" x 1.54" Internal Balance Race Harmonic Balancer

Pro/Race harmonic dampers are designed for a wide range of high performance applications. This "all steel" damper is direct replacements for factory cast iron versions which may fracture or disintegrate at high RPM and are...

Product#: HD100024

LS1 Harmonic Balancer 25% Under Drive Sport/Damper Only/11.07/6.14/2.53/3.88

The Pro/Sport under drive dampers are smaller in diameter than factory to slow the speed of belt-driven accessories. Since performance engines are generally used at higher RPM, the belt speed can be reduced to save horsepower...

Product#: HD100023

400 Harmonic Pro/Sport High Carbon Steel 6.61" x 1.52" External Balance Harmonic Balancer

Pro/Sport harmonic dampers protect against harmful engine vibrations that can lead to valvetrain damage, rapid bearing and timing chain wear or ultimately crankshaft breakage. Machined to exacting tolerances and assembled...

Product#: HD100016

283-350 Pro/Sport High Carbon Steel 6.10" x 1.52" Internal Balance Harmonic Balancer

Pro/Sport harmonic dampers protect against harmful engine vibrations that can lead to valvetrain damage, rapid bearing and timing chain wear or ultimately crankshaft breakage. Machined to exacting tolerances and assembled...

Product#: HD100015

396-427 with Supercharger Pro/Race All Steel 7.01" x 1.73" Internal Balance Race Harmonic Balancer

Pro/Race harmonic dampers are designed for a wide range of high performance applications. This "all steel" damper is direct replacements for factory cast iron versions which may fracture or disintegrate at high RPM and are...

Product#: HD100013

454 Pro/Race All Steel 7.01" x 1.73" External Balance Race Harmonic Balancer

Pro/Race harmonic dampers are designed for a wide range of high performance applications. This "all steel" damper is direct replacements for factory cast iron versions which may fracture or disintegrate at high RPM and are...

Product#: HD100020

396-427 Pro/Sport High Carbon Steel 7.01" x 1.73" Internal Balance Harmonic Balancer

Pro/Sport harmonic dampers protect against harmful engine vibrations that can lead to valvetrain damage, rapid bearing and timing chain wear or ultimately crankshaft breakage. Machined to exacting tolerances and assembled...

Product#: HD100018

LS1/LS2/LS3/LS6 Harmonic Balancer Sport/Internal/12.7/7.52/2.47/2.86

Pro/Sport harmonic dampers protect against harmful engine vibrations that can lead to valvetrain damage, rapid bearing and timing chain wear or ultimately crankshaft breakage. Machined to exacting tolerances and assembled...

Product#: HD100010

283-350 Pro/Race All Steel 6.61" x 1.54" Internal Balance Race Harmonic Balancer

Pro/Race harmonic dampers are designed for a wide range of high performance applications. This "all steel" damper is direct replacements for factory cast iron versions which may fracture or disintegrate at high RPM and are...

Product#: HD100022

283-350 Pro/Sport High Carbon Steel 6.61" x 1.52" Internal Balance Harmonic Balancer

Pro/Sport harmonic dampers protect against harmful engine vibrations that can lead to valvetrain damage, rapid bearing and timing chain wear or ultimately crankshaft breakage. Machined to exacting tolerances and assembled...

Product#: HD100025

LS1/LS2/LS3/LS6 Harmonic Balancer 25% Under Drive Sport/Damper Only/11.76/6.75/2.83/3.03

The Pro/Sport under drive dampers are smaller in diameter than factory to slow the speed of belt-driven accessories. Since performance engines are generally used at higher RPM, the belt speed can be reduced to save horsepower...

Product#: HD100017

LS1 Harmonic Balancer Sport/Internal/12.4/7.52/2.31/3.70

Pro/Sport harmonic dampers protect against harmful engine vibrations that can lead to valvetrain damage, rapid bearing and timing chain wear or ultimately crankshaft breakage. Machined to exacting tolerances and assembled...

Product#: HD100019

283-350 Pro/Sport High Carbon Steel 6.61" x 1.52" Internal Balance Harmonic Balancer

Pro/Sport harmonic dampers protect against harmful engine vibrations that can lead to valvetrain damage, rapid bearing and timing chain wear or ultimately crankshaft breakage. Machined to exacting tolerances and assembled...

Product#: HD100021

454 Pro/Sport High Carbon Steel 7.01" x 1.73" Internal Balance Harmonic Balancer

Pro/Sport harmonic dampers protect against harmful engine vibrations that can lead to valvetrain damage, rapid bearing and timing chain wear or ultimately crankshaft breakage. Machined to exacting tolerances and assembled...

Product#: HD100004

454 Pro/Street Bonded Nodular Iron 8.00" x 1.93" External Balance Harmonic Balancer

This Pro/Street bonded nodular iron damper features special splines to enhance bonding between the elastomer, inner hub and outer ring preventing any radial movement. PRO/STREET Harmonic Dampers feature: Nodular Iron Constru...

Product#: HD100006

400ci Pro/Street Bonded Nodular Iron 8.00" x 1.47" External Balance Street Harmonic Balancer

This Pro/Street bonded nodular iron damper has special splines to enhance bonding between the elastomer, inner hub, and outer ring preventing any radial movement. PRO/STREET Harmonic Dampers feature: Nodular Iron Constructio...

Product#: HD100003

396-427 Pro/Street Bonded Nodular Iron 8.00" x 1.93" Internal Balance Harmonic Balancer

This Pro/Street bonded nodular iron damper features special splines to enhance bonding between the elastomer, inner hub and outer ring preventing any radial movement. PRO/STREET Harmonic Dampers feature: Nodular Iron Constru...

Product#: HD100001

283-350 Pro Street Bonded Nodular Iron 6.10" x.760 Internal Balance Street Harmonic Balancer

This Pro/Street bonded nodular iron damper features special splines to enhance bonding between the elastomer, inner hub and outer ring preventing any radial movement. PRO/STREET Harmonic Dampers feature: Nodular Iron Constru...