TiAL Sport Q 51mm Blow-Off Valve - 12 PSI Spring - Black

How do I choose the right spring rating?

• Choose the spring by the engine's idle vacuum, not by boost. Measure idle vacuum with a reliable gauge and compare it with the spring chart for the valve. Supercharged engines use a very weak spring so the valve stays open at idle, which is normal for those setups.

Does the Q need a new flange welded in?

• No welding is needed when a standard TiAL BV50 flange is already in place; the Q bolts straight to it. A weld flange, clamp assembly and O-ring are included for a new installation.

How loud is the Q compared with the QR?

• The Q's open body gives the greatest flow and a quieter discharge. The QR discharges at higher velocity with less flow, so it is typically louder when it is not recirculated.

How should the vacuum line be connected?

• Run 1/4 in (6 mm) hose from the air fitting to full engine vacuum, preferably directly at the intake manifold, with no check valve or tee in the line.

What warranty does it carry?

• TiAL Sport covers its products for 24 months from the date of purchase against defects in workmanship or components. Mishandling, abuse or faulty installation void the coverage, and the warranty is not transferable.

Shipping

• Orders placed before 3 PM EST typically ship the same business day. Larger items ship within 1 to 3 business days.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Special order items follow a lead time we confirm with you individually before the order is committed.
• Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
• Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
• Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
• Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
• Product images may be representative. The SKU and specifications in the listing are what ships.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Returns & Refunds · Warranty