{"product_id":"sb-gfb-atmosphere-venting-bov-w-whistling-trumpet-t9401","title":"GFB Atmosphere Venting BOV W\/Whistling Trumpet T9401","description":"VTA T9401 expands the blow off sound options for your VW or Audi!\u003cbr\u003e\u003cbr\u003eThe VTA is a performance blow-off valve solution for Audi or VW vehicles with an electronic factory diverter valve.\u003cbr\u003e\u003cbr\u003eChoose Your Sound: With the removable extended trumpet, you can configure the T9401 to give you either a classic whoosh, or the loudest, most unique whistle sound youve ever heard on a Euro vehicle!\u003cbr\u003e\u003cbr\u003eCustomise Your Sound: The T9401 also features adjustable spring pre-load so you can fine tune when it blows off, and for how long. A softer pre-load allows the valve to blow off for longer and at lower engine loads. If you prefer to hear it only at higher engine loads you can use a firmer pre-load.\u003cbr\u003e\u003cbr\u003eLow-Profile, Easy Installation: Using GFBs integrated solenoid design stacked in an over\/under configuration, the super-low profile allows clean and simple fitment (even if your aftermarket intake is using up all the space!).\u003cbr\u003e\u003cbr\u003eThe VTA is a performance blow-off valve solution for Audi, VW, Skoda and SEAT vehicles with an electronic factory diverter valve.  If you want sound with your performance (or performance with your sound!), GFBs VTA delivers just that! By combining the proven performance benefits of our ground-breaking DV+ with atmosphere venting, the VTA delivers an aggressive blow-off sound, improved throttle response and boost recovery, as well as superior boost holding and reliability in extreme conditions.\u003cbr\u003e\u003cbr\u003eThe VTA shares the successful DV+ design philosophy:\u003cbr\u003e\u003cbr\u003eKeep what works, replace what doesnt\u003cbr\u003e\u003cbr\u003eThis means we retain ECU control and the solenoid from the factory diverter to ensure the fastest possible response time, without the added and unnecessary cost of replacing the solenoid like some brands do.\u003cbr\u003e\u003cbr\u003eThe weak part of the factory diverter has always been the plastic valve mechanism  this is the part we replace. The VTA features CNC machined billet components that last a lifetime, and we also change the valve operation method for better performance. The factory diverter valve can only operate in two states  open, or closed. When it opens fully at low boost, or during a partial throttle lift mid-corner, it causes increased lag and a noticeably non-linear boost transition.\u003cbr\u003e\u003cbr\u003eGFB pioneered the use of pilot operation in the DV+, which works by re-purposing the factory solenoid to control the pressure behind the piston rather than the piston itself. This allows the solenoid stroke to be much shorter, speeding up the response time and increasing the actuation force. More importantly, it allows the piston to open and close progressively in response to the amount of boost pressure present, which smooths boost transitions and reduces the lag caused by the factory diverter valve.\u003cbr\u003e\u003cbr\u003eIt is this design philosophy that makes the VTA not only the best performing blow off valve solution, but also the best value on the market.\u003cbr\u003e\u003cbr\u003eKey features:\u003cul\u003e\n\u003cli\u003eTMS Technology for faster boost recovery on gearshift and during throttle modulation\u003c\/li\u003e\n\u003cli\u003eImproved boost holding ability\u003c\/li\u003e\n\u003cli\u003eAtmosphere venting for blow-off sound\u003c\/li\u003e\n\u003cli\u003eRetains ECU control\u003c\/li\u003e\n\u003cli\u003eSimple, direct bolt-on kits include everything you need to install\u003c\/li\u003e\n\u003cli\u003eManufactured in Australia in accordance with ISO 9001\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003eVTA or DV+?\u003cbr\u003e\u003cbr\u003eDepends if you want sound or not. Both valves are constructed with the same quality materials and valve mechanism, and both offer the same performance and reliability benefits. However, the VTA vents to atmosphere for sound whilst the DV+ recirculates the air to keep it quiet.\u003cbr\u003e\u003cbr\u003eWhy choose a VTA over a BOV spacer?\u003cbr\u003e\u003cbr\u003eBOV spacers are cheap and they make sound. But thats it. All the inherent performance and reliability issues you get with the factory diverter valve remain, because a spacer doesnt change the diverter valve in any way. The VTA improves the operation of the diverter valve for sound AND performance.\u003cbr\u003e\u003cbr\u003eWhy choose a VTA over a kit that includes a solenoid?\u003cbr\u003e\u003cbr\u003eBecause theres no performance benefit to replacing the factory solenoid, only a much higher price! If a VTA with the factory solenoid can open in a couple of hundredths of a second, why pay more than you need to?","brand":"Bapcor","offers":[{"title":"Default Title","offer_id":47455693046013,"sku":"SBX-P6888637","price":648.96,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0675\/8396\/7485\/files\/T9401_1-scaled.jpg?v=1777191716","url":"https:\/\/krenbits.com\/products\/sb-gfb-atmosphere-venting-bov-w-whistling-trumpet-t9401","provider":"Kren Bits","version":"1.0","type":"link"}