Here, you are looking at the Grimmspeed Bypass valve for your 2008-2014 WRX / 2005-2009 LGT with an aftermarket TMIC.
Grimmspeed started a ground-up design with the valve body and base. Both are CNC-machined out of billet 6061 aluminum alloy for its strength and light weight properies. They are then anodized in either a black or red finish to give them a brilliant appearance, provide corrosion resistance and match other GrimmSpeed offerings. Compared to the stock plastic construction on the 08-14 WRX platform, GrimmSpeed Bypass Valves not only stand out, but are guaranteed to stand the test of time.
For the internal components of the valve, Grimmspeed chose to utilize a machined brass piston for its anti-corrosion and low thermal expansion characteristics.
The piston seats onto an internal o-ring to create a perfect seal, eliminating boost leaks common in OEM and cheap aftermarket BPVs.
In order to make sure this could keep up with high power levels, Grimmspeed chose to use a massive 38mm diameter piston/sealing ring for the ability to dump pressure quickly. This is especially important on high boost applications to keep the turbo from sustaining damage and the BPV maintaining leak-free operation.
A precisely-tuned steel spring alleviates the need for any tuning or adjusting of the valve, with no engine tuning required to run the unit.
Buna-N O-rings were the next logical choice due to their resistance to degrading from fuel and oil exposure. In addition, the o-ring grooves utilize a single dovetail design for superior retention. This guarantees the o-ring will not fall out and has the perfect crush for sealing the body together. To top things off, a swivel fitting is employed on the valve to make for easy installation and accommodate best routing on custom setups. A GrimmSpeed signature branded badge graces the top of each unit so that everyone will know you chose the best valve in the biz.
With the GrimmSpeed Bypass Valve installed, a definite crispness and sound change is noticeable through the intake and due to the leak free nature of our valve, the car builds boost much more quickly over the leak-prone OEM version. Both the 08-14 WRX/05-09 LGT and 04-21 STI (EJ) fitments utilize the same valve but with different footprints, for use across a broad range of vehicles including Legacies, Foresters and Bajas with the proper intercooler setup. This listing will include the specific footprint for 2008-2014 WRX / 2005-2009 Legacy GT using aftermarket intercoolers. This configuration will not work on your factory intercooler, or an STI style system.
- CNC-Machined 6061 Aluminum
- Corrosion-resistant anodized finish, available in both red and black
- Oversized 38mm brass piston for superior flow Precision-tuned steel spring for long life
- No tuning or adjustment required
- Single dovetail o-ring grooves with Buna-N O-rings for great oil resistance, retention, and leak-free operation
- Swivel air fitting to aid in installation and for accommodating custom setups
Requires Aftermarket TMIC, does not work w/ OEM