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Cusco Rear Diffuser Package 2002-2007 WRX / 2004-2005 STI

by Cusco
Original price $275.00 - Original price $275.00
Original price
$275.00 - $275.00
Current price $275.00

Cusco Diffuser Kit, Complete, Impreza, WRX, STi

The Cusco Diffuser Kit offers increased performance in two different ways. The first is by stiffening up the rear sub-frame of the Impreza by connecting both sides of the body.

Subimods has made ordering even simpler, with this package you will receive every item necessary to install an OEM Diffuser on your 2004-2005 STI or 2002-2007 WRX

1x - Cusco Rear Subframe Bar - 673 487 A
1x - Cusco Diffuser Bracket Set - 672 487 S
4x - Diffuser Bolts - 901000365
1x - OEM Diffuser - ST91225FE000

Customer Reviews

Based on 1 review
Orren Seunarine
Fits Perfect

Item fits perfect without much issues. The diffuser is small so you can barely see it from far but I decided to go with it to keep the subaru OEM look.

Be mindful, you may have to shave off the back edge of the diffuser if you have a 3" catback that is bolted at an angle.

Also, I wished I received new bolts in the package to bolt the Cusco rear chassis subframe bar. Reason being is these bolts tend to get old and rusted over time. I resorted to purchasing new bolts before installing the system.


Thank you for sharing your experience with the Cusco Rear Diffuser Package for your WRX/STI. We're glad to hear that the item fits perfectly with only minor adjustments needed. It's great that you decided to go with it to maintain the Subaru OEM look. We appreciate your feedback about the need for new bolts to be included in the package, as this would help to ensure a smoother installation process for future customers. Thanks for your review!


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