John how bad was the noise on the Mongoose? I've got a IX GSR and I'm about to start doing some mods but the exhaust is a tough choice as its a daily driver and I don't want it loud!johnbanks said:I got the car with Ecutek, Walbro, 3" Mongoose (original elbow), HKS EVC V.
I've remapped it with ECUflash, changed the airbox lid and fitted an AVC-R. It now performs far better. The induction noise is a little louder, but the HKS panel filter (from the dealer) makes more difference than the airbox lid mod to noise.
I started to get fed up with the noise, so for now I have the HKS catback on the car.
John,johnbanks said:It isn't terrible, it is just that I don't like loud cars. The resonators in it are shorter/smaller than the stock FQ system. It is noticeably louder than that, but not completely different if you see what I mean.
FQ system with bung in sounded ideal for most driving, although when thrashing the car you could mainly hear the roar of the engine from the front, and I think that non-Scooby 4 pots sound characterless, not a nice noise and it is restrictive. So I want an exhaust that is just loud enough to hear over the actual direct engine noise IYSWIM.