V5-APS

iTrader: (1)

Does anyone here know if the 2003-2004 Type UK STi's have the Tumble valves in the intake manifold ??
Any way to tell from looking at the engine bay ??

Thanks

Butty

iTrader: (2)

Yes they do.
Look for throttle pot and motor at each end of TGVs:


JDM STis have a TGV body but no valve, spindle or throttle pot & motor. Spec C s have a single piece manifold.

NIck

V5-APS

iTrader: (1)

Will fitting the Spec C part make any difference....??

Butty

iTrader: (2)

Only in that it allows more room underneath it to fit a bigger diam turbo inlet hose.
The Spec C came with a n OEM hose bigger than the STi item and flows just as well as a Samco (see sticky thread about Shauns work on modding his Spec C).

The match between inlet man. & TGV body is very very poor. Porting them and the TGV bodies should help newage cars doing high bhp.

NIck