2PCS 40mm High Performance Air Intake Manifold for 2-Stroke Gas Bicycle Motor Engine Kit - Upgrade Your Motorized Bike for Better Airflow & Power - Perfect for DIY Gas Motorized Bicycle Builds & Performance Tuning

2pcs 2 in 1 monifold intake; Length of neck: 28mm; Out dia of neck:19mm; Inner dia of neck:13.5mm 32/40mm 2 in 1 monifold intake; 100% fully higher performance made with high quality aluminum; Higher performance manifold intake matching the intake port 40mm of most 2-stroke engine 66cc/80cc Advance design with o-ring which seals and eliminate any possible leaks that may cause poor performance. Improve the performance and adds up to the efficiency.