# Latest mod to my 06 Impreza WRX STI

**URL:** <https://forums.speedlife.net/t/latest-mod-to-my-06-impreza-wrx-sti/243234>\
**Category:** Shift518 Automotive\
**Created:** [April 1, 2009, 4:25pm UTC](https://forums.speedlife.net/t/latest-mod-to-my-06-impreza-wrx-sti/243234 "2009-04-01T16:25:18Z")\
**Posts on this page:** 1\
**Showing post:** 19

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**Author:** ![cazwrx187](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/cazwrx187/32/6388_2.png) [@cazwrx187](https://forums.speedlife.net/u/cazwrx187)\
**Post date:** [April 1, 2009, 5:39pm UTC](https://forums.speedlife.net/t/latest-mod-to-my-06-impreza-wrx-sti/243234/19 "2009-04-01T17:39:14Z")

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> [@Cammed 305, more snky on the streets](https://forums.speedlife.net/t/cammed-305-more-snky-on-the-streets/16564/8):
>
> Yeah the motor is VERY well engineered-I’m glad they didn’t put it in the IX like they originally planned and took the time to sort everything out. The new hybrid turbocharger and amazingly effecient factory o2 housing and downpipe make a world of difference also. Only car I know of that doesn’t really ‘gain’ power by going to a full turboback (catted) vs the factory setup. Only ‘major’ restriction seems to be the stock muffler (and cats of course).
> 
> See link here for info: [http://perrinperformance.com/pages/show/80](http://perrinperformance.com/pages/show/80)  
> HP/TQ Gains of Cat-Back vs Turbo-Back: [http://perrinperformance.com/products/show/685/Cat-Back-Exhaust-Stealth-Black?category=6&model=26](http://perrinperformance.com/products/show/685/Cat-Back-Exhaust-Stealth-Black?category=6&model=26)

Is this the same on the new Ralliart?

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