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 

Your Subaru’s cooling system is only as good as its weakest link, commonly that’s the old, dry-rotted OEM...
The GrimmSpeed Charge Pipe kit replaces the restrictive plastic stock unit on the FA20 powered WRX with larger...
-61%
NGK Copper Spark Plugs 3672 - Subaru EJ25 Turbo Models ( 2004+ STI / 2006-2014 WRX)
NGK Copper Heat Range 6 Spark Plugs LFR6A-11 High Performance Spark Plug. The Copper Plug will allow you...
Accessorize the top of your engine and the pulleys with this cool looking cover from PERRIN. Choose red...
If you're in the business of adding artwork, sound, performance, and value to your vehicle, then you will...
Special Fitment Note: Supported fitments include only those vehicles running OEM STI and GrimmSpeed Top Mount Intercoolers. The...
Silicone technology allows us to design a turbo inlet hose that is better in all aspects than the...
Silicone technology allows us to design a turbo inlet hose that is better in all aspects than the...
-25%
HKS Legamax Premium for the Honda Civic Type-R
Currently in stock - 6/26/18 Legamax Premium mufflers offer the performance benefits of a sports muffler with the...
CUSTOM TUNING REQUIRED! The COBB 3-Port Boost Solenoid (BCS) is an excellent upgrade for modern turbocharged vehicles, enabling...
IN THE BOX (1) PERRIN Subaru 3" Inlet Hose - (3) Polished couplers - (1') 1/2" Fuel hose...
The Original Direct-Fit BCS for turbo Subarus. GrimmSpeed is proud to provide the most complete and easy to use 3-Port Electronic Boost...
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