the original replacement is expensive so when it needs replacing many customers opt 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 knucle pipe as C-AEG371
