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IAG Performance 8mm Thick Phenolic Spacers 2002-2014 WRX / 2004-2021 STI / 2005-2012 LGT / 2004-2013 FXT

Original price $69.99 - Original price $69.99
Original price
$69.99 - $69.99
Current price $69.99

This IAG 8mm Thick Phenolic Spacers kit (1 PAIR) is designed to be used with the IAG V2 TV and IAG Dual Injector TGV Housings which fit the 2002+ Subaru WRX / STI / LGT / FXT. This is a simple, cost-effective way to maximize the power of your current set-up. The 8mm spacer offers superior thermal insulation and also aids in raising the intake manifold*. This can be useful when plumbing custom intercooler piping or rotating the intake manifold.

Why it works: The concept behind the phenolic spacer is simple: isolate the heat produced by the engine from the entire intake tract. This results in a cooler path for the intake air. This leads to a lower and more stable intake air temperature (IATs). Lower IATs mean you have the capability to make more power with your current set-up.

IAG phenolic spacers are engineered and manufactured at our facility in Westminster, MD. The spacer was designed using the factory Subaru head. Each spacer is then CNC machined from a single piece of phenolic. We INCLUDE 4 custom made Nitrile gaskets with your phenolic spacers: one to go on either side of the spacer. Our intake manifold gaskets are not layered with paper like the factory gasket. They are engineered to stay intact when removed from your cylinder head. This prevents you from having to clean up residue that sticks to the cylinder head after years of use. Also included are longer stainless steel spring pins. The pins aid in aligning the spacer/gasket with the cylinder head. They are longer to account for the thicker spacer.

*Due to clearance issues that can arise with raising the intake manifold, please confirm fitment for your specific application before ordering.


  • (x2) 8mm Phenolic Spacers
  • (x4) Nitrile Intake Gasket
  • (x4) Cylinder Head Spring Pin
  • (x8) M8x35 Bolts / Washers

Fitment Notes:
* If you have an older V1 TGV you will require an additional hardware pack that is sold separately.

Customer Reviews

Based on 3 reviews

For heat and clearance, highly recommend!


Thank you for recommending the IAG Performance 8mm Thick Phenolic Spacers! It is great to know that these spacers effectively address heat and clearance issues. Your endorsement highlights their importance for maintaining optimal engine performance and reliability. This feedback will be valuable for others considering similar upgrades. We appreciate your 5 Star Review!



Definitely recommend this to everyone who’s done a tgv delete already got it taken apart might has well get these 8mm spaces amazing product

Hi there!

Thank you for leaving a 5 Star Review of the IAG Performance 8mm Thick Phenolic Spacers. The Subimods Team is happy to hear that you found them to be an amazing product and would recommend them to others who have already done a tgv delete. We appreciate your support and hope to continue providing high-quality products for your vehicle. Thanks again!


10/10 great times

10/10 would recommend to anyone building their subie. Phenolic spacers keep the heat from your block separate to the intake.


Thank you for the 5 Star Review! You described what the IAG Performance 8mm Phenolic Spacers do! Cooler air through your intake manifold means better performance!


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