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 

Special Fitment Note: Supported fitments include only those vehicles running OEM STI and GrimmSpeed Top Mount Intercoolers. The...
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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...
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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Turbosmart Kompact Dual Port Blow Off Valve - Subaru WRX 2002-2007 / STI 2004+
If you're making enough power to surpass the limits of your factory blow off valve, or if your...
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HKS Hi-Power Cat-Back Exhaust For 2002-2007 WRX/STI
HKS knows how to develop exhaust systems to better suit turbocharged platforms. The increased piping diameter, straighter piping...
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NGK Iridium Spark Plugs One Step Colder 2667 - Subaru WRX 2002-2005
NGK Laser Iridium Spark Plugs BKR7EIX Sold In 4 packs
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Cobb Tuning Accessport For 2002-2005 WRX
Simple ECU flashing with gauge package! The new in-cabin mountable Accessport V3 has a large, full color, higher...
Fits *2008-14 Subaru WRX, 2008-2021 Subaru STIPackage Includes:(x1) Fuel Line Kit(x1) IAG Fuel Rails(x1) Aeromotive Adjustable Fuel Pressure...
Features: Heavy Gauge Steel Tubing That is 3x Thicker than OE 3/8" 1018 CR Steel Flange 12 Gauge...
This C.A.R.B. approved intake and integrated airbox looks great and has the combined benefits of a short ram...
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Turbosmart Recirculating Blow Off Kompact Plumb Back Universal 34mm
These blow off valves are design to be a better than OEM replacement, yet outperform when it comes...
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