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danST Engineering are pleased to offer this Premium quality velocity stack kit for the Kawasaki ZX10R (2008-2010) throttle bodies.
The kit consists of the following:
4x Flange fitment Oval trumpets to suit the 2008-2010 ZX10R throttle Bodies, 20mm long
8 x Button Head Screws
(NOTE: Throttle Bodies and Air filter plate shown in the photo's are for illustration only and are not included in this listing price)
These velocity stacks are machined from a single aluminium billet for maximum performance and quality.
This kit has been designed for anyone running the ZX10R throttle bodies without the original airbox arrangement - particularly in kit or modified car applications. They will also work in custom bike applications - though compatibility with the standard airbox cannot be guaranteed.
A pipercross PX500 air filter with the appropriate baseplate (shown in the photographs) can be incorporated into the kit if desired. Please contact us for further information and fitment options.
Why fit velocity stacks or 'trumpets'? A radius at the inlet of an inlet tract serves to smooth and even out the flow into each intake runner. You will note that any manufacturers standard equipment will feature such a radius for this reason. Without this radius power and torque can both be negatively affected. Additionally when tuning for power increases a longer inlet tract (the distance from inlet to back of valve being the important length) has been found to be extremely beneficial, especially on a lower revving car engine.
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!
These kits are in stock.
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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Tags: Trumpet, Velocity Stack, ZX10R, ZX10