Injection twin downpipe both spi and mpi

The original replacement is expensive so when it needs replacing many customersopt for our stage one kit C-STN22 which gives extra power for litle more cost.in this kit you will get an exhaust manifold, which is better flowing with a stainless steel knuckle jointed pipe to the catalyst for longer life,a new rear single box exhaust, K&N air filter plus all gaskets and fittings required. You can of course just purchase the manifold and knuckle pipe as C-AEG371.