GFB Blow Off Valve Respons
The Respons II Bias-Adjustable Blow-Off Valve from Go-Fast Bits is designed to solve a number of problems with your factory diverter valve and other aftermarket blow-off valves.
Unlike many twin-port dump valves the Respons II is fully adjustable. It offers a complete range of adjustability from fully atmospheric to fully recirculating. As the atmospheric route opens, the recirculating route closes.
This means you can finetune the exact amount of noise you want out of the valve and carefully ensure that you have no driveability issues.
TMS is technology developed by Go-Fast Bits designed to improve driveability and throttle response.
Your factory diverter valve will be designed to open partially under most conditions except full boost.
Go-Fast Bits take the opposite approach and design their valves to stay closed except when they need to open.
This means that whereas your factory valve will let the turbo spool down and pressure in the intake system drop completely, theirs keeps a little pressure in the system. This makes a huge difference to turbo spool times. By not requiring you to build boost again from scratch you should be able to get back on boost quicker.
Staying closed under full and part load should improve driveability too. Under part load it ensures you're getting full boost.
Under full load and you're ensuring that you're getting all of the power out of the engine. The valve is built to stay closed under even very high loads.
| Brand | GFB |
| MPN | T9002 |
UK Mainland Delivery Prices
| Delivery Type | Cost | Estimated Delivery Time |
| Standard Delivery | from £1.33 | 2-3 working days from day of despatch(Excludes weekends and Bank Holidays) |
| Express Delivery | from £1.68 | 1-2 working days from day of despatch(Excludes weekends and Bank Holidays) |
| Special Delivery | from £12.54 | For any next working day delivery order before 4.30pm Monday to Thursday. For any weekend delivery order before 4.30pm Friday |
| Click & Collect | from £7.62 | Collect your parcel from a local post office. 2-3 working days from day of despatch(Excludes weekends and Bank Holidays) |
For international shipping please visit our delivery page.
For information about returning an item please visit our returns page.
Our Payment Options
Online we currently accept payment from the methods listed above including a wide range of finance options. In store we also accept payment in the form of cash and gift vouchers.
Finance Options
In order to get the kit you want, when you need it, without ruining the family finances we offer a highly flexible range of finance options to help you get the best products on your bike now rather than at the end of the season when you've saved up the cash to make the purchase. There are even interest free options which effectively spread the cost without costing you any extra.
D.T.(Automotives) Limited T/A Demon Tweeks is authorised and regulated by the Financial Conduct Authority and is the broker and not the lender. Our FCA registration number is 689896. D.T.(Automotives) Limited offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance and Klarna. Credit is provided subject to affordability, age and status. Minimum spend applies. Not all products offered by Secure Trust Bank PLC are regulated by the Financial Conduct Authority.
