BB Chevy Idler Plate

Big Block Chevy Idler Plates

Fits all Big Block Chevy, KB, KB Olds, Rodeck and 481X. It is machined from 3/4" thick aluminum or magnesium plate. It has a 7" long slot which provides for adequate adjustment. The assembly includes: studs, spacers, nuts, washers and 1/4" thick water block-off plates.

Option: Ported 1" water block-off plates are available.
PN:156206-0018

Big Block Chevy Idler Plate
with Outboard Support

This idler bracket assembly provides the most stable mounting platform for the idley pulley. The back plate is 3/4" thick. The outboard support is 1/2" thick. It accepts either smooth or toothed idler pulleys. Includes 1/4" water block-off plates. All parts machined from 2024-T3 aluminum bar and plate.
PN:156200-0010 w/3.2 Idler Spacing
PN:156200-0012 w/4.4 Idler Spacing
BB Chevy Idler Plate w/Outboard Support
SB Chevy Idler Plate

Small Block Chevy Idler Plate

For all Small Block Chevys and derivatives such as Rodeck or Donovan. Machined from 3/4" thick aluminum plate for rigidity in full competition applications. The kit includes: studs, spacers, nuts, washers and 1/4" thick water block-off plates.
PN:156206-0006

Refer to: Accessory Drives for additional Chevy water block options.

Ford Idler Plate
with Outboard Support

This idler bracket assembly provides the most stable mounting platform for the idley pulley. The back plate is 3/4" thick. The outboard support is 1/2" thick. It accepts either smooth or toothed idler pulleys. All parts machined from 2024-T3 aluminum bar and plate.
Note: This bracket does not block off the water holes.
PN:156200-0020 w/3.2 Idler Spacing
PN:156200-0022 w/4.4 Idler Spacing
Ford Idler Plate w/Outboard Support
426 Chrysler angled Idler Plate

426 Chrysler Angled Idler Plate

Complete with top brace and dual magneto support. This idler bracket allows the maximum amount of idler pulley adjustment. The adjusting slot starts at the top in the center and moves out and down at a 45 degree angle to clear under a dual magneto drive. The top brace provides additional outboard support for the idler pulley, keeping it parallel with the blower drive sprockets. The additional friction surface also helps prevent slipping.

Dual magneto supports are for I.C.E., Enderle and S.A.E. standard or tall cam location. Brackets and idlers are available in either aluminum or magnesium. The 3/4" diameter idler stud nut and side stools for toothed idler are available in titanium. Includes all bolts, nuts, studs and spacers.

NOTE: Multiple configurations are available - Please call to configure your application and for pricing.
Refer to: Angled Magneto Dives and Offset Magneto Dives for additional information.

426 Idler Plate

This is the most popular idler plate for the 440 or the 426 Chrysler with only one magneto. It can be used with a dual magneto drive but the idler pulley travel is limited by interference with the magneto drive. This 3/4" thick idler plate provides a stable platform for the idler pulley. Assembly includes studs, spacers, nuts and washers.
PN:156206-0003 Short Slot
PN:156206-0004 Long Slot
426 Idler Plate
392 Chrysler or 417 Donovan Idler Plate

392 Chrysler or 417 Donovan

This 3/4" thick idler plate provides a stable mounting platform for the idler pulley. Spools, studs, nuts and washers for mounting the idler plate are available. All parts machined from 2024-T3 aluminum bar and plate. Magnesium plate machined from AZ31B-H24 plate. Studs are heat treated chrome-moly steel. Nuts are aircraft quality.

PN:156206-0060 Idler plate w/Long Slot
PN:156206-0062 Idler plate w/Short Slot Magnesium