2008-2014 STI

The OEM BOV's tiny outlet limits the boost-venting rate and may result in leaks. The PERRIN BOV has a much larger adjustable outlet, and 1.225" inl...

PERRIN Performance intake systems deliver precision with CNC mandrel-bent aluminum tubing, aptly-positioned MAF sensor and plumbing to ensure preci...

The PERRIN Turbo Heat Shield is CNC formed from 304 stainless steel. The backside of the shield is cut to fit all aftermarket downpipes. It is also...

The PERRIN Rear Shifter Bushing removes the soft rubber bushing on the back of the shifter rod. This vital connection point joins the shifter mecha...

Reduce engine oil temperatures, extend engine life, and keep your horsepower consistent with a PERRIN Oil Cooler.In racing conditions engine oil te...

Subaru's stock turbo inlet tube is prone to failure; we personally experienced two on our 2002 WRX, resulting in a noticeable decrease in performan...

Subaru's stock turbo inlet tube is prone to failure; we personally experienced two on our 2002 WRX, resulting in a noticeable decrease in performan...

In racing conditions engine oil temperature skyrockets. This causes decreased engine performance and reduces the oil's ability to properly lubricat...

The Perrin top mount intercooler provides powerful cooling capabilities for your Subaru STI, featuring durable cast aluminum end tanks and a dense ...

  The Perrin Subaru Wheel Spacers, with 56mm Hubs, are dual drilled for a universal Subaru fitment and constructed from lightweight aluminum. Exten...

  Perrin Subaru's 5x114.3/5x100 3mm Slip-On Wheel Spacers - w/ 56mm Hubs (No Studs) require no extended studs for a simple, slip-on design that is ...

Upgrade your STI reverse lockout lever with a the PERRIN smooth glide reverse lockout lever.The PERRIN Performance reverse lock out lever combines ...

Perrin Performance intake systems are precisely crafted with the correct MAF alignment and pipe size, essential for maintaining proper air-fuel rat...

Enhance the top of your engine with the stylish aluminum PERRIN Belt Cover! This pulley cover is a direct replacement of the OEM plastic pulley cov...

Transform the aesthetic of the engine bay with one of Perrin's Fender Shroud Sets. Optimized for a sleek, accented aesthetic, these shrouds extend ...

Perrin Fender Shrouds provide a uniform and aesthetically-pleasing look from the headlight to the firewall, revamping the engine bay of any vehicle...

This PERRIN radiator shroud is crafted from 6061 aluminum and finished with a Hyper Pink powder coating. Simple installation makes this piece a gre...

This PERRIN radiator shroud is crafted from 6061 aluminum and finished with a neon yellow powder coating. Simple installation makes this piece a gr...

This Red crank pulley from Perrin has been precisely designed to reduce rotational mass for rapid revs, better throttle response, and improved perf...

This Perrin crank pulley has been optimized to reduce engine rotational mass, promoting faster revs and enhanced response while maximizing engine p...

Accent the top of your engine with this stylish PERRIN Pulley Cover. Crafted from durable 5052 plate aluminum, it features precision-drilled mounti...

This PERRIN Alternator Pulley boasts a light weight of only .116lbs, lighter than an OEM alternator pulley, and matches our signature Crank Pulley ...