Two petal vulcanized reed cage or reed block. One the best ways to increase performance with air and fuel delivery is a quality tunable reed cage. Thi skit comes with both carbon fiber and glass reeds at .35 and .45 thick petals which controls responce along with three venturis at 24,26 and 28 in relation to carb size. You can use the 24 for 19mm and 17.5 high performance carbs.
The reed cage is over looked in al lot of mods and is very important when tunning since it has a complet effect on response and guess what most stock reeds are metal so the break and ruin your piston and cylinder.
The kits includes a spacer which further increases performance by adding a taller manifold for much better air and fuel delivery.
Mineralli engines used in
Aprilia
Yamaha
40QMB
TNG
Genuine
Adley
Keewat 2T
Benelli
Can be used with stock intake on carbs 19mm and less