TiAL Sport QRJ Blow Off Valve

TiAL Sport


The QRJ is TiAL's latest boost control valve. Designed with the needs of high performance recirculating systems in mind. The QRJ features a new body design, compact installation envelope, high-flow capacity, and configurable inlet and outlet ports.



  • For use on turbo-charged and super-charged applications (Paxton, Vortec, etc.). The body and all internal components are CNC-machined from 6061 aluminum alloy. It features a large 1.50 in (38.5mm) valve.
  • Optional configurations of Hose and or V-band connections for the inlet and outlet ports.
  • The valve seat seal utilizes a Viton O-ring that is clamped in place to prevent the possibility of sticking to the seat and pulling out. The valve stem and guide are Teflon-lubricated, hard anodize-coated for wear resistance.
  • The QRJ comes with our own machined aluminum banjo-type air fitting and bolt, with over sized 10mm hose barb for quick actuator response.
  • Color anodized aluminum options (Silver, Red, Blue, Purple, Black).
  • Multiple inlet and return port options for many install configurations.
  • Internal return spring pressure tuned for fastest response. Custom spring options are available for other configurations.
  • When Ordering, the Body, and 2 Flange sets will be selected.  [ Body #] + [ Inlet Flange #] + [ Outlet Flange #]


What's in the Box:

QRJ Assembly

TiAL Air Fitting
Configured Port flanges of choice ( See Below )



Configurable Ports:

The QRJ can be configured with V-Band and Hose connections on either port.
V-Band in - V-Band out
V-Band in - Hose out
Hose in - V-Band out
Hose in - Hose out
& A Diffuser outlet


TiAL V-Band Clamp:

altTiAL Designed V-Band Clamps are manufactured in house.
CNC machined aluminum clamps ensure a secure and pressure tight fit. Featuring our new CNCd stainless steel swing out retaining hardware, to make installation and service simple and quick


High performance Diaphragm:

The QRJ features TiAL's high performance diagram. Long cycle life, zero leakage & zero breakaway friction. For fast and reliable boost control.


Available Colors:





QRJ BOV Option
Flange Options 38.5mm Vband, 38.5 (1.50in) Hose, 29mm (1.14in), 25.4 (1.00in)
Flange Materials Aluminum, Stainless
Pipe Size Flange cut for 2"-3" IC pipe
Colors Black, Blue, Red, Purple, Silver
Spring Pressures -3psi - Other Configurations available.
Thread M10 x 1.0 ( Air Fitting )




Replacement Part Numbers:

QRJ BOV Body Spring # Item #
Silver 3 Psi 004724
Black 3 Psi 004727
Red 3 Psi 004729
Blue 3 Psi 004726
Purple 3 Psi 004728




Replacement Part Numbers - Flanges:

QRJ BOV - Flanges Item Name Item #
38mm V-band Set (AL weld Flange) QRJWFAL1.5ClampKit 004809
38mm V-band Set (SS weld Flange) QRJWFSS1.5ClampKit 004811
38.5mm (1.50in) Hose Fitting QRJ1.5TubeFlg  004492
29.0mm (1.14in) Hose Fitting - QRJ 29MM Tube Flg QRJ1.14TubeFlg 004794
25.4mm (1.00in) Hose Fitting QRJ1.0TubeFlg 004812
Diffuser Outlet Port QRJDiffuserOutletFlg  004806
50mm Q V-Band Adapter QRJtoQ&QRVbFlg  004781