What’s TMS? GFB’s Turbo Management System is the term we apply to our diverter valves that have features designed specifically for the purpose of turbo lag reduction.
Tests show that TMS features can return the engine to peak boost up to 30% faster than a factory diverter valve when shifting gears*.
On top of the TMS benefits, the Respons also packs GFB’s patented adjustable venting bias system found on the Stealth FX.
This unique system allows the amount of air vented to either recirc or atmosphere to be infinitely varied to change the venting sound like a stereo volume dial!
So if you want noise with your performance, the Respons can deliver! By fine-tuning the venting ratio, you CAN achieve a blow-off sound WITHOUT throwing a CEL, running rich, stalling, using more fuel or causing any other problems commonly associated with atmo-venting valves on cars with MAF sensors.
Fits 02-07 WRX, 04-10 STi and 05-08 Forester XT Models
If you have any questions about shipping or returns, please contact us at (714) 670-7358 or through our contact page.
DOMESTIC SHIPPING
We ship packages worldwide with a variety of carriers. When purchasing products through the website, the shopping cart will automatically calculate shipping with UPS and FedEx. If you would like to use USPS as a shipping option please contact us and your order can be modified to reflect the changes. On large items the calculations may not be accurate. If this is the case you will be contacted about your order to discuss shipping options. All orders are sent with insurance and are shipped with signature required. This protects you from your packages getting stolen or lost. If you are not at home to sign for your package you may have your order shipped to a work or alternative address which can be done when the order is being placed. Please don’t hesitate to contact us if you have any questions about the shipping rates or shipping options.
INTERNATIONAL SHIPPING
Celtic Motorsport ships all of our products world-wide. We use a variety of excellent international carriers and offer great pricing and fast delivery. For smaller orders that are being shipped International we can use USPS Priority or EMS. Please contact us for a quote on your shipment.
DAMAGED SHIPMENTS
Celtic Motorsport insures all orders to protect you. Every order is packed with the utmost care to prevent damage to your order. In the event your shipment is damaged, you will need to contact us immediately upon receiving your order so that a claim process may be started. The claim may possibly be started by you the consumer but in most cases we will handle the claims.
RETURNS
Please contact Celtic Motosport if you have any questions about returning a product.
- Returns must be made within 30 days of original shipment
- Only uninstalled / unopened products in resalable condition can be returned
- Most returns are subject to a 20% restocking fee
- There are No returns on special order parts