This is the right manifold for c20xe engines with tb's?
Is it a 4-2-1 manifold or 4-1?
Exhaust manifold. High output for Astra MK3 2.0L 16v & Cavalier GSI (you can modify it to fit the MK2 Astra 16v) must be fitted with an exhaust system with a minimum diameter of 2.5”. (when fitting all exhaust studs must be removed & replaced with cap head bolts)