PERRIN Performance™ produces an extremely cost effective alternative to aftermarket fuel injectors.
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These injectors are brand new factory units, PERRIN™ modified for additional flow.

How the program works:

When the customer orders this item they will be instructed how to ship their injectors to PERRIN™. PERRIN Performance™ will then precision machine the injectors to flow in excess of 816cc. The injectors are then shipped, fully insured, next day air directly back to the customer. Injectors are not mixed. Each customer will receive the same set of injectors that they send in.

PERRIN Performane™ will modify your existing injectors for use with a larger than stock turbo, higher boost and aftermarket electronics.

The PERRIN Performance™ modification consists of a special machining technique in which, using a custom end mill, we remove the screen on the end of the fuel injectors.

Through our web site and the PERRIN™ network of dealer's consumers can participate in the fuel injector core modification program. PERRIN™ will take your own fuel injectors, modify them and return them to you now able to support higher horsepower and boost. 

 The stock STI fuel injectors flow 550cc of fuel or 52.4lb/hr. When modified by PERRIN™ your injectors will flow 816cc/min or 77.81 lb/hr. Almost a 50% gain in fuel flow. At the stock injector flow of 550cc your Subaru will max out at 320hp-380hp (Crank HP) With the new PERRIN™ modified 816cc fuel flow rate your engine now has enough flow for 480hp-550hp. Each fuel injector is precision machined to flow in excess of 816cc. Injector "on time" is not affected by modifying OEM STI injectors.

A larger fuel pump than stock, preferably 255lph or higher, must be used in order to keep up with the larger injectors.