Just some additional info I wanted to point out regarding the gains. I remember that Cosworth released an intake manifold setup that had great gains. I'm just thinking the PTuning combo Header/Exhaust/Tune + the Cosworth intake manifold plenum would make one helluva screamer!
And as a side note this is from Cosworth's site for their Stage 1 Power package:
Quote:
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Originally Posted by Cosworth
The Cosworth FA20 Stage 1 Power Package is available in three power options that enable you to build your upgrade to match your budget.
Stage 1.1 provides a direct replacement cat-back exhaust, air filter, thermostat and custom Cosworth ECU calibration to lift the stock peak power output by 23hp.
Stage 1.2 adds a tuned mid pipe exhaust with integrated Helmholtz resonator to deliver an additional 5hp and a much improved exhaust note.
Stages 1.3 completes the Power Package by including a lightweight, thermal barrier coated intake manifold that maximises airflow to deliver the full performance uplift of 40hp at 4,100 rpm and peak performance of 230hp.
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40hp gain is what a 25% power increase as someone pointed out? So, a 23hp increase just on the manifold mod, filter and cat-back alone. Then added a mid-pipe only exhaust and then tuned it for a total of 40hp.
So, it seems when you actually get someone who knows what they are doing (Toan from PTuning), you can squeeze the FA20 even in N/A form.