danST Engineering are pleased to offer this premium quality Billet velocity stack. Features:

50mm Bore

75mm Outer Diameter at Radius End

Standard Weber/Jenvey Lower Mounting Flange (65mm Hole Centres)

Lightweight Aluminium Construction

Machine Polished Aluminum Finish

Length 25/50/90/120mm - Please specify using the drop down menu (If no drop down is available i.e ebay listings, please specify length in notes during checkout)

Machined from a solid billet as a single piece, this premium quality velocity stack shares many design features with our long standing 2 piece spun version. However being a single piece design it is particularly suited to heavy duty (motorsport) applications, or for anyone requiring an even higher level of fit and finish.

The flange mount will suit all our velocity stack kits (adapter plates, clamp rings) as well as many other manufacturers carburettors and throttle bodies sharing the 65mm hole centre mounting. 

Please note this listing is for a single trumpet.

These are perfect for those looking to really make their engine bay stand out.

Below are links to two different engines fitted with two popular bike carb kits (one 1800 zetec with R1 Mikuni carbs, one Ford 2.3 Duratec fitted with ZX9R carbs). The lower lines are both carb sets without trumpets and the higher lines are when fitted with our 50mm trumpets. In both cases significant performance increases (typically 5-9bhp) are seen between 3500-6000rpm when the carburettors are fitted with our trumpet kit. Additionally the torque curve is seen to be much smoother. Note that the Duratec is making peak power very low in the RPM range due to a very restrictive exhaust (soon to be replaced!), but the effect of the trumpets on engine performance is clear. We see so many bike carb conversions running without any trumpets (bike breakers often remove them along with the original bike airbox) - ALL of which would see the benefits highlighted below, probably the cheapest power you can find!


1800 Zetec on 40mm R1 Carbs, no trumpets vs danST 50mm trumpet kit

2300 Ford Duratec ZX9R Carbs, no trumpets vz danST 50mm trumpet kit

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Universal CNC Machined Velocity Stack Trumpet, 50mm Dia, All Lengths

  • £20.00

  • Ex Tax:£20.00

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Tags: CNC, Machined, Velocity Stack, Trumpet, Jenvey, Omex, Weber, Dellorto, Air Horn,