danST Engineering are pleased to offer this high quality lightweight aluminum spun trumpet. Features:

40mm Bore

75mm Outer Diameter at Radius End

Jenvey/Weber Lower Mounting Flange (65mm Hole Centers)

Lightweight Aluminium Construction

Natural Polished Aluminum Finish

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

These trumpets are also a universal design - the flange suits Jenvey and Weber type bolt down fitment with 65mm hole centers. The flange could also be cut off should you wish to connect to a throttle body with silicone hoses and jubilee clips.

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