2015-2021 STI Engine

The Perrin TMIC Coupler Kit offers a sophisticated touch to your engine bay. This sturdy replacement for the factory coupler includes a 5-ply fiber...

The Perrin TMIC Coupler Kit offers a sophisticated touch to your engine bay. This sturdy replacement for the factory coupler includes a 5-ply fiber...

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...

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...

The PERRIN Front Mount Intercooler Core and Beam provides a direct replacement for the limited factory top mount setup, reducing the chances of hea...

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...

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...

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...

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

Replace the ugly OEM plastic dipstick handle with the PERRIN Dipstick Handle. Made from CNC machined aluminum and featuring a black, blue, pink, ne...

Replace the ugly OEM plastic dipstick handle with the PERRIN Dipstick Handle. Made from CNC machined aluminum and featuring a black, blue, pink, ne...

Replace the ugly OEM plastic dipstick handle with the PERRIN Dipstick Handle. Made from CNC machined aluminum and featuring a black, blue, pink, ne...

Replace the ugly OEM plastic dipstick handle with the PERRIN Dipstick Handle. Made from CNC machined aluminum and featuring a black, blue, pink, ne...

Replace the ugly OEM plastic dipstick handle with the PERRIN Dipstick Handle. Made from CNC machined aluminum and featuring a black, blue, pink, ne...

Replace the ugly OEM plastic dipstick handle with the PERRIN Dipstick Handle. Made from CNC machined aluminum and featuring a black, blue, pink, ne...

Replace the ugly OEM plastic dipstick handle with the PERRIN Dipstick Handle. Made from CNC machined aluminum and featuring a black, blue, pink, ne...

Replace the ugly OEM plastic dipstick handle with the PERRIN Dipstick Handle. Made from CNC machined aluminum and featuring a black, blue, pink, ne...

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...

The Perrin 15-21 WRX/STI Radiator Shroud (Without OEM Intake Scoop) - Neon Yellow arrives with a powder-coated multi-piece design for easy bolt-on ...

The Perrin 15-21 WRX/STI Radiator Shroud (Without OEM Intake Scoop) - Hyper Pink arrives with a powder-coated multi-piece design for easy bolt-on i...

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...