Engine

Here you will find all the components under the hood of your performance street car. From oil changes to short blocks and everything in between. Not sure whats right for your vehicle? Contact sales@builtnotboughtauto.com 

Preferred venting solution for serious street tuners and racers. Big flow and even bigger sound. Easy to install...
-30%
Turbo XS RFL Blow Off Valve for 2008-2014 WRX
The WRX08-RFL or Really F#$%!@ Loud is designed specifically for the owner of a 2008+ WRX who wants...
-30%
Turbo XS Hybrid 50/50 Blow Off Valve for 2008-2014 WRX
TurboXS releases the first Hybrid Blow Off Valve designed specifically tuned for the 2008+ Subaru WRX or 2004+...
-30%
Turbo XS Recirculation By Pass Valve for 2008-2014 WRX
Specifically designed for MY 2008+ Subaru WRX & 2004+ Legacy GT. The WRX08-RBV requires no adapter kit to...
-30%
Turbo XS RFL Blow Off Valve for 2002-2007 WRX / 2004+ STI
With new and improved styling, the WS-RFL remains true to it's roots - it's still really f'n loud!...
-30%
Turbo XS Racing Bypass Valve for 2002-2007 WRX / 2004+ STI
Specifically designed for MY 2002 - 2007 Subaru WRX and STi's will also fit the 2008+ STI, the...
Quiet and completely street-legal! A full recirculating BOV, ideal for Subaru enthusiasts who don’t want to be noticed....
Preferred venting solution for serious street tuners and racers. Big flow and even bigger sound. Easy to install...
Legamax Premium Series™ 304 SS Exhaust System with Quad Rear Exit (31021-AN010) by HKS®. Tig Welded. Exhaust Tubing...
Legamax Premium Series™ 304 SS Exhaust System with Quad Rear Exit (31021-KN001) by HKS®. Flux Welded. Exhaust Tubing...
Hi-Power Series™ 409 SS Dual Cat-Back Exhaust System with Split Rear Exit by HKS®. Exhaust Type: Cat-Back. Exhaust...
If you are looking for a great way to squeeze a little extra performance from your vehicle, then...
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