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GFB Deceptor Pro II T9525 Diverter / Blow Off Valve with Electronic Sound Adjustment System for Audi, Ford, VW, Mazda, SAAB Applications

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Now you can control the sound of the BOV from inside the cabin!

So how much more can you do with a blow-off valve? Well, the Deceptor Pro II takes the ‘Respons’ concept even further...

  • Adjust your BOV venting bias electronically on-the-fly
  • Revised porting to optimise flow and venting bias
  • Compact design fits in most factory valve locations
  • Direct bolt on for many vehicles
  • New bore finishing process ensures a lifetime of reliable operation

Deceptor Pro II features

Direct bolt-on for most vehicles available:

  • Remote proportional venting bias/volume control- from silent to loud or anywhere in between
  • Sleek, compact in-car BOV volume controller with backlit dial
  • End point adjustment to control maximum vent to atmosphere bias setting
  • Volume adjustment mechanism driven by a high-torque geared electric motor
  • Durable, low-friction ger train supported by precision sealed ball-bearing
  • Supplied with all parts and wiring required to have it up and running quickly and easily
Vehicle Fitment
Make Series Years Notes
FORD AUSTRALIA XR6 FG 4.0L turbo 08-on
VW Bora MK4 1.8t 00-05
AUDI TT 8N 1.8t 98-06
SAAB 9-5 Turbo 98-09
SAAB 9-5 Turbo 98-09
SAAB 9-5 Turbo 98-09
SAAB 9-5 Turbo 98-09
SAAB 9-5 Turbo 98-09
MAZDA SP Turbo (150kW/200hp) 2002
AUDI TT 8N 1.8t 98-06
AUDI TT 8N 1.8t 98-06 When installing a GFB valve, it must be installed in the OPPOSITE orientation to the factory plastic Bosch valve - i.e. air must enter the GFB valve at the bottom, and dump through the sides.
AUDI TT 8N 1.8t 98-06
AUDI TT 8N 1.8t 98-06
SAAB 9-3 Turbo 98-02
SAAB 9-3 Turbo 98-02
SAAB 9-3 Turbo 98-02
SAAB 9-3 Turbo 98-02
SAAB 9-3 Turbo 98-02
AUDI B5 1.8t 1995-2001 When installing a GFB valve, it must be installed in the OPPOSITE orientation to the factory plastic Bosch valve - i.e. air must enter the GFB valve at the bottom, and dump through the sides.
AUDI B5 1.8t 1995-2001 When installing a GFB valve, it must be installed in the OPPOSITE orientation to the factory plastic Bosch valve - i.e. air must enter the GFB valve at the bottom, and dump through the sides.
SAAB 9-3 Turbo 98-02
AUDI B6 1.8t 2001-2005 When installing a GFB valve, it must be installed in the OPPOSITE orientation to the factory plastic Bosch valve - i.e. air must enter the GFB valve at the bottom, and dump through the sides.
AUDI B6 1.8t 2001-2005 When installing a GFB valve, it must be installed in the OPPOSITE orientation to the factory plastic Bosch valve - i.e. air must enter the GFB valve at the bottom, and dump through the sides.
AUDI S4 B5 (Typ 8D) 2.7 Biturbo (two valves required) 97-01
SAAB 9-5 Turbo 98-09
SAAB 9-5 Turbo 98-09
VW New Beetle 1st Generation 1.8t 99-on When installing a GFB valve, it must be installed in the OPPOSITE orientation to the factory plastic Bosch valve - i.e. air must enter the GFB valve at the bottom, and dump through the sides.
AUDI S3 8L 1.8t 1999-2003 When installing a GFB valve, it must be installed in the OPPOSITE orientation to the factory plastic Bosch valve - i.e. air must enter the GFB valve at the bottom, and dump through the sides.
VW Golf GTI Mk4 1.8t 97-05 When installing a GFB valve, it must be installed in the OPPOSITE orientation to the factory plastic Bosch valve - i.e. air must enter the GFB valve at the bottom, and dump through the sides.
VW Passat B5-B5.5 1.8t 96-05 When installing a GFB valve, it must be installed in the OPPOSITE orientation to the factory plastic Bosch valve - i.e. air must enter the GFB valve at the bottom, and dump through the sides.
VW Passat B5-B5.5 1.8t 96-05
AUDI S3 8L 1.8t 1999-2003 When installing a GFB valve, it must be installed in the OPPOSITE orientation to the factory plastic Bosch valve - i.e. air must enter the GFB valve at the bottom, and dump through the sides.
AUDI 8L 1.8t 1996-2003
FORD AUSTRALIA XR6 BA-BF 4.0L turbo 02-08
FORD AUSTRALIA XR6 BA-BF 4.0L turbo 02-08
FORD AUSTRALIA Territory SY 4.0L turbo 06-11 When installing a GFB valve, it must be installed in the OPPOSITE orientation to the factory plastic Bosch valve - i.e. air must enter the GFB valve at the bottom, and dump through the sides.
VW Polo GTI Mk4F (Typ 9N3) 1.8t 05-09 When installing a GFB valve, it must be installed in the OPPOSITE orientation to the factory plastic Bosch valve - i.e. air must enter the GFB valve at the bottom, and dump through the sides.