Cobb Tuning LF Blow Off Valve - Subaru WRX 15-18/Levorg 14-18/Forester XT 13-18
Cobb Tuning LF Blow Off Valve - Subaru WRX 15-18/Levorg 14-18/Forester XT 13-18
Universal fit
No vehicle selection needed.
This part may still fit. Check the details below or contact us before ordering. Ask about fitment
Fitment not confirmed
This part may still fit. Check the details below or contact us before ordering. Ask about fitment
Vehicle fitment
This part is listed to fit the following vehicles.
In Melbourne? Fit it in our workshop.
We fit parts in-house at the RevZone workshop. Book a time and bring your car in.
Description
The C.A.R.B. Certified COBB LF BPV is a compact and lightweight by-pass valve that is capable of holding very high boost pressure without leaking. Its updated design reduces control volume by 30% allowing for extremely fast venting of boost when actuated. Innovative engineering and precision manufacturing result in a compact package able to fit in the confines of a tight engine bay. Due to the low weight of the components, the moving parts in the LF BPV have less inertia and can respond faster than heavier components in other bypass valves. This updated design uses a Banjo-fitting vacuum port which provides 360 degree adjustability of hose routing. This results in a simpler install and less potential leak points than the NPT ports. This new design also includes a piston o-ring seal that is twice the diameter of the old design allowing more seal compression and reduced wear. Adjustability of the spring seat is no longer needed due to the updated spring and seal design which provides a 60% increase in clamping force at peak boost while maintaining similar operation at idle and transient loads.
Note: This is an updated version of the original 745665 LF BPV that now includes a different internal spring.
Original Spring (uncoated)
- Free length: 3.5"
- Rate: 7.4 lbf/in
- Bench cracking vacuum installed in LF BPV: -5.7 psi
New Spring (yellow)
- Free length: 2.25"
- Rate: 40.5 lbf/in
- Bench cracking vacuum installed in LF BPV: -6.7 psi
Why?
A compact and very lightweight bypass valve that is loaded with features and reliability holds high levels of boost without leaks.
Features:
- 100% Billet Aluminum Construction
- 100% O-Ring Sealing
- 100% Rebuildable if there ever is an o-ring failure
Specifications
- Part Number
- '745670
- Brand
- Cobb Tuning
Shipping
Orders are processed within 1-2 business days (Monday to Friday), and orders placed before 12pm AEST are usually dispatched the same day. Once dispatched, standard shipping takes 3-7 business days and express 1-3, with tracking emailed as your order leaves.
If part of your order is out of stock, we'll contact you with the option to split the shipment or hold it until everything is ready. Read the full shipping policy.
Returns
You have 14 days from delivery to request a return on unused parts in their original packaging. Refunds incur a 15% restocking fee (20% for special orders), or choose store credit and the full purchase value is applied to your account.
Parts that have been test fitted, installed, or used can't be returned, and special-order or overseas-ordered items are assessed case by case. Faulty or incorrectly supplied items are always covered at no cost to you. Read the full returns policy.
