BUY NOW, PAY LATER. Starting at 0% APR 
EVP Blow-Off Valve (BOV) Adjustments
Installation instructions for the EVP Blow-Off Valve (BOV) Adjustments on the . Parts, tools, and full procedure.
Before you start
| Spring Color | Spring Length |
|---|---|
| Un-Painted | 3.7 in |
| Blue +1 | 4.0 in |
| Red +2 | 4.25 in |
Procedure
How to Adjust the BOV
- Step 1
With the included shortest spring, the cap should be all of the way tight. If the piston is open too much at part throttle, then the Blue spring should be used with the cap fully tight and so on.
- Step 2
If with the Red (longest) spring is too stiff and not blowing off enough, then adjust the cap softer (counterclockwise.) or move back to the Blue spring.
Procedure
How to Change Springs in the BOV
- Step 1
Remove your BOV from the vehicle, turn the end cap counterclockwise until you can remove the cap. Apply pressure to the cap while doing this. Remove the cap, spring, and piston. Check your O-rings on the piston. Re-install the piston into the body, install the correct spring for your application into the piston. Re-install the end cap,
Fig. 2 Cautionthe spring needs to be seated into the groove of the end cap. Tighten all the way down. Don’t loosen the cap to where the O-ring is visible, you will lose vacuum pressure. (Figure 2).
Need technical support?
Submit a ticket with your vehicle and what you're seeing, and our support team will get back to you.
