Forge Blow Off Adapter For BMW Mini Cooper S Turbo

  • £74.15
  • (Delivery from £20.00)
Item in Stock | Usually dispatched within 24 hours


  • Reduces Turbo Lag
  • Increase in Throttle Response
  • Reduced Air in Take Temperatures
  • Increase in BHP
  • Swoosh Nose Created by Dumping

PLEASE NOTE: This will only fit the N14 Engine up to July 2010


Your BMW mini copper S turbo utilizes a bypass facility which works by recirculating air around the turbo charger housing. The bypass facility allows charged air to flow from the boost side to the intake side of the turbo charger.

The BMW MINI ECU opens and closes a solenoid on the turbo charger which controls when the bypass facility is allowed to work. When under acceleration the turbo creates air pressure as the fan situated within the turbo spins. Each time a gear change is made the the throttle valve is momentarily closed and the but the turbo is still spinning constantly generating boost pressure.

The boost pressure generated is redundant and has no place to go which results in the turbo slowing down and being subjected to extreamly large volumes of pressure and stress. As soon as the throttle valve is opened again there is often a lag as it takes a few moments for the turbo to spin back up the required pressure generating sufficient amounts of boost.


To combat the problem of stress and turbo lag a Forge recirculation or diverter valve can be used. With the bmw Mini cooper s, when the throttle valve closes the ECU then opens the recirculation valve causing the excess boost pressure to flow from the boost side to the intake side of the turbo. This prevent the turbo from slowing down and get rid of the lag. The problem with this is that the turbo generates heat and the recirculated air is made hot. The cooler the air the more power available.

A forge blow off valve is a huge benefit as the hot air is dispersed into the atmosphere allowing only cold air to be drawn in increasing power and performance.

 At PRS Racing we don't want to charge any more than is necessary for the postage hence we charge by the weight of each product, helping to ensure cost effective shipping prices.
The following prices are based around quotes and can be subject to change. If this is the case PRS Racing reserve the right to contact you with any shipping amendments prior to shipping of your products to ensure 100% customer satisfaction. All prices are INCLUSIVE of VAT.

UK Delivery Services:

Free Delivery is 1st Class Royal mail Signed for if Under 3KG

Special Delivery is Pre 1Pm Royal Mail - if under 3KG


Next day Delivery Is Royal mail business if under - 3KG


Over 5KG DHL/UK mail next day

European Delivery

Delivery is based on weight in both the UK and Europe please allow 3 - 7 working days for delivery

0 - 0.49kg       £4.99
0.5 - 0.99kg    £5.99
1kg - 2.99kg   £6.99
3kg +              £20  (Weight Dependent)

Rest of World Delivery

International orders are worked on Volumetric weight. Please allow 4 - 10 working days for delivery

0 - 0.49kg      £9.99
0.5 - 0.99 kg  £12.99
1kg - 2.99kg  £14.99
3kg +             £25.00 (Weight Dependent)

All Parcels are shipped with a tracking number to ensure you know when to expect your order. If you have supplied us with a contact number or e mail, you can txt to re arrange the delivery with the Currier at a suitable time and date. Items that are in stock are shipped same day if the order is placed before 2pm.

PRS are committed to keeping a large stock of goods, however we cannot always guarantee that all items will be in stock at time of purchase. If your item is not in stock we will contact you informing you when to expect your item.

PRS cannot be held liable for any reasonable or unavoidable loss or damage suffered as a result of a delay in delivery.

Please Note: As a result of Brexit and the continued changes some orders my be subjected to import Tax and handling Fees. Please check first if you are unsure before placing an order.