Tensioners & Idlers

When doing a timing belt replacement it is always a good idea to replace the tensioner(s)/idler pulleys while you are in there. 

Tensioners & Idlers

When doing a timing belt replacement it is always a good idea to replace the tensioner(s)/idler pulleys while you are in there. 

Showing 1 - 10 of 10 items
  • IAG is excited to announce that we have acquired the rights to LIC Motorsport’s Adjustable Timing Idlers. In an effort to continue offering an extremely popular and proven product to the Subaru community, IAG approached LIC in early 2020 with the intention of expanding its offerings to IAG’s growing network of retail and wholesale clients. Once terms were agreed upon, some very minor design tweaks and adjustments were made to the product.


    The timing idlers were developed and extensively tested and proven in the LIC Time-Attack program. Over the past decade, the eccentric idlers have become the installer’s standard in both street and motorsports applications, playing a helpful role in bringing cams back into proper alignment with heads or blocks that have been resurfaced or feature thicker head gaskets.


    The IAG Performance Adjustable Timing Idler kit is specifically intended to properly align the camshafts on Subaru EJ20/EJ25 cylinder heads and/or blocks that were resurfaced (“Reducing” long block length), or utilize thicker head gaskets (“Increasing” long block length). The ability to adjust and properly align the cams is recommended for any performance-built Subaru.


    The product is precision CNC machined and hand-assembled in-house. Each idler features a machined 10mm hex enabling your socket to hold it in place while you adjust the timing to perfection. The idlers come engraved with the IAG logo on the face and are manufactured to strict OEM tolerances.


    How it all works:

    • Idler #1: This upper idler when adjusted affects the RIGHT (Passenger side) intake/exhaust cams.
    • Idler #2: This lower idler when adjusted affects the LEFT (Driver side) intake/exhaust cams.


    The adjustable idler kit is designed for long blocks that were reduced in overall length due to resurfacing the heads during a rebuild or decking the block and/or both. When that process is done it effectively retards the timing because the belt has not changed length and something needs to make up that difference in the slack (the tensioner can only do so much). Likewise, if you utilize thicker head gaskets, the same issue is present (just vice versa, which is increasing the overall long block length).


    Includes:

    • (x2) OEM Quality Idlers with CNC machined Eccentrics (Single roller bearing design)
    • (x2) M10 Zinc Plated Bolts

    Subaru
  • When doing a timing belt replacement it is always a good idea to replace the tensioner(s) while you are in there. With the Gates Timing Belt Tensioner you can rest assured knowing you used a great part. Gates makes many OE parts and their aftermarket parts exceed OE specifications. 

    This Idler Pulley will fit the left bottom location on the SOHC cars and both left side locations on DOHC cars.

    Subaru
  • When doing a timing belt replacement it is always a good idea to replace the tensioner(s)/idler pulleys while you are in there. With the Gates Timing Belt Tensioner/idler you can rest assured knowing you used a great part. Gates makes many OE parts and their aftermarket parts exceed OE specifications.

    Subaru
  • When doing a timing belt replacement it is always a good idea to replace the tensioner(s)/idler pulleys while you are in there. With the Gates Timing Belt Tensioner/idler you can rest assured knowing you purchased a high quality part. Gates makes many OE parts and their aftermarket parts exceed OE specifications.

    Subaru
  • When doing a timing belt replacement it is always a good idea to replace the tensioner(s)/idler pulleys while you are in there. With the Gates Timing Belt Tensioner/idler you can rest assured knowing you purchased a high quality part. Gates makes many OE parts and their aftermarket parts exceed OE specifications.

    Subaru
  • When doing the timing belt or any other major service on your Subaru it is always a good idea to replace the idler sprocket. Get that piece of mind knowing you used the same part your car originally came with.

    Subaru
  • When doing a timing belt replacement it is always a good idea to replace the tensioner(s)/idler pulleys while you are in there. With the Gates Timing Belt Tensioner/idler you can rest assured knowing you used a great part. Gates makes many OE parts and their aftermarket parts exceed OE specifications.

    Subaru
  • When doing the timing belt or any other major service on your Subaru it is always a good idea to replace the tensioner. Get that piece of mind knowing you used the same part your car originally came with.

    Subaru
  • When doing a timing belt replacement it is always a good idea to replace the tensioner(s)/idler while you are in there. With the Gates Timing Belt Tensioner/idler you can rest assured knowing you used a great part. Gates makes many OE parts and their aftermarket parts exceed OE specifications.

    Subaru
  • Discontinued product

    NOTE: This product number has been discontinued.
    Recommended replacement is IAG-ENG-5120



    These parts are designed for long blocks that have been narrowed down from resurfacing the heads during a rebuild or decking the block and/or both. When that process is done it effectively retards the timing, this is because the belt has not changed length and something needs to make up that difference in the slack (the tensioner can only do so much), and likewise if you have different thickness head gaskets, these are perfect in conjunction with that, as the same issue is present (just vice versa, which is a lengthened block).

    Subaru
Showing 1 - 10 of 10 items