Free Shipping on Auto Parts Orders Over $75.                           Order by 11 PM EST for Same Day Shipping!

KRC Idler & Tensioner Pulley Kits


KRC
KRC Idler & Tensioner Pulley Kits

Product images may differ from actual product appearance.

Why is an idler tensioner necessary?
KRC's idler tensioner is essential on dirt cars. Belt slippage can occur on cars that exceed 7,000 RPM and/or use a large or heavy fixed fan blade or a fan blade with a lot of pitch, which potentially causes overheating & pulleys to wear faster. This occurs on both single drive belt and pulley systems with a power steering pump mounted on the front of the engine.

The reason for this problem is the centrifugal force from the fan as it decelerates. The fan belt and pulleys are required to work like brake shoes to slow the fan. The belt stretches so it slips while braking, inducing heat into the belt. The belt will continue to stretch as the race goes on, causing engine temperature to slowly climb. KRC's extensive testing has proven the only way to properly tension the belt to prevent slippage is with an idler pulley mounted on the passenger side of the engine. This helps the engine run cooler and keeps the belt tighter, allowing faster acceleration out of turns & harder braking on corners.


6 Products

Chevy

KRC 40400300 - KRC Idler & Tensioner Pulley Kits
612-40400300
Adjustable Idler Pulley Kit
  • Small Block Chevrolet
  • FREE
    SHIPPING
    & HANDLING!
    $167.94
    Order Today Ships 06/08/16
    KRC 40400360 - KRC Idler & Tensioner Pulley Kits
    612-40400360
    Adjustable Idler-Tensioner Assembly
  • Small Block Chevy(Crate Kit Replacement)
  • FREE
    SHIPPING
    & HANDLING!
    $169.92
    Order Today Ships 06/08/16
    KRC 40450000 - KRC Idler & Tensioner Pulley Kits
    612-40450000
    Adjustable Idler Pulley Kit
  • Small Block Chevrolet
  • With 93mm Denso Alternator Bracket
  • FREE
    SHIPPING
    & HANDLING!
    $258.13
    Order Today Ships 06/08/16

    Ford

    KRC 40410200 - KRC Idler & Tensioner Pulley Kits
    612-40410200
    Adjustable Idler Pulley Kit
  • Small Block Ford
  • FREE
    SHIPPING
    & HANDLING!
    $162.92
    Order Today Ships 06/08/16

    Replacement Idler Pulleys

    KRC 40406000 - KRC Idler & Tensioner Pulley Kits
    612-40406000
    Replacement Idler Pulley
  • Includes Stud & Bolt
  • FREE
    SHIPPING
    & HANDLING!
    $78.30
    Order Today Ships 06/08/16
    KRC 40305000 - KRC Idler & Tensioner Pulley Kits
    612-40305000
    Replacement Idler Pulley
  • 76mm
  • $37.49
    Order Today Ships 06/08/16

    6 Products