Well all I can say is don't bother, unless your Renault manifold is broken.
Renault:
Toyosports:
Mine had lost 6bhp from putting the Toyosports manifold on it, so that's a bit disappointing. Although there could be any number of factors which could cause that, like spark plugs being older and having suffered the engine running lean after fitting the new manifold but before mapping, and there's a possibility that I over-oiled my ITG filter after cleaning it. But in any event,
Paul managed to get it back up to 188.3bhp after a good deal of effort, which is 0.8 more than what it ran with the standard manifold before mapping. I'd like to know what mine would have got with a map on the standard manifold - probably more than that. The final run was with the manifold glowing though, so heat soak might have been an issue!
Anyway, I'd say it was worthwhile if you have a broken manifold, but if yours is fine, just leave it and spend the money elsewhere. It does drive much more smoothly now, so I'm pleased in that respect. And it did all come in less than the cost of a new manifold from Renault. But I am a little disappointed because in the end I think I've sacrificed everyday drivability with it being a bit more drony (and not in a good way) and having more vibration from the Powerflex insert, and ended up with basically what I used to have... with my wallet being £1k lighter. The joys of Renault Sport ownership, eh?
Joe
But they are good power gains low down though, are you just running the toyo manifold and itg ? Or do you have other parts on the car?