Engine Kits

8" Damper for 396/427 Chevy (Internal)
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8" Damper for 396/427 Chevy (Internal)



Part #: 90004
List Price: $355.98
Our Price: $177.99
You Save: $177.99



8" Damper for 396/427 Chevy (Internal) This 8" damper is designed for the big block 396/402/427 engines. The stock damper for these engines is 7" in diameter but for high performance applications this is a better choice. This damper is made of tough 1045 steel and includes 60° of easily readable timing marks plus engraved marks every 90° as well. Like all PowerForce dampers, this damper features 'Super Compression.

PowerForce+Plus Race Dampers are made from bulletproof 1045 steel. These dampers are designed to be installed on race engines that may rev over 10,000 rpm. Optimum damping occurs in the 6500 to 7500 rpm range. The machine work on these dampers is second to none and the critical fit tolerances and balance are held more closely than OEM. All externally balanced dampers feature bolt-in counterweights. This feature allows for swapping weights between dampers (Ford) or adding them to internal balanced dampers (Chevy) if you change applications. The basic damper in any family is the same with either a different counterweight (Ford) or an added counterweight (Chevy). This provides an unlimited amount of flexibility. Plus, you can't buy a more accurately balanced damper.

What is Bonding?When dampers are bonded, what does this mean? It means that the elastomer (rubber) that is sandwiched between the ring and the hub is bonded, or vulcanized, to metal. This is similar to the process used to bond the metal motor mounts to the rubber vibration isolaters used in these mounts.  This greatly increases the safety of the damper as most stock, and many inexpensive aftermarket dampers, are just pressed together and under heavy duty applications, the ring can rotate, moving your TDC mark from the true position, or fly off the engine. And that is very bad!

Balance Style Neutral
Brand Professional Products
Degree Marking Range 60 BTDC to 0 TDC
Degree Markings Yes
Engine Balance Internal
Harmonic Balancer Construction Elastomer
Harmonic Balancer Finish Black anodized
Harmonic Balancer Material Steel
Mounting Hardware Included No
Outside Diameter (in) 8.000 in.
Part Type Harmonic Balancers
Product Line Professional Products PowerForce Plus Harmonic Dampers
Quantity Sold individually.
Safety Rating SFI 18.1