danST Engineering are pleased to offer this high quality lightweight aluminium sectional CNC'd trumpet assembly. These trumpet sections are priced individually (PER section), therefore a trumpet would comprise, as a minimum, a base, a tubular section and a bell mouth. Additional sections may be added to make the trumpet longer. The bases, sections and bell mouth are threaded, allowing quick changes to the length of the velocity stack, when fine tuning. Loctite is required on the threads once the optimum length of velocity stack has been ascertained.

See other listings for base, 45mm section and bell mouth.


This trumpet section features:


45mm Bore 

95mm Length 

Lightweight Aluminium Construction

Natural Polished Aluminium Finish

danST Engineering began manufacturing these trumpets due to customer demand for adjustability of the length of velocity stacks, for fitment on our specialist carb and throttle body conversions.

This listing is for a 95mm section ONLY.


The overall length of an induction system (from carb or throttle body mouth to back of inlet valve) can have a dramatic impact on both power and torque. These trumpets are designed to offer the ultimate in fine tuning of this dimension. Trumpet length can be easily adjusted during the tuning stage and then locked in position once the optimum engine characteristics have been established.


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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45mm diameter, 95mm Length, Sectional Velocity Stack Trumpet, Section

  • £15.75

  • Ex Tax:£15.75

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Tags: Trumpet, Velocity Stack, Weber, Jenvey