lewisf182 said:
How much is it for this sort of mod? And what bhp can be expected? Any downsides?
Not sure of the gains on the 996 on the 997.1 you looking at something like 20/25bhp but its all in the low mid range with no top end losses so is makes the usual driving range much more responsive and adds big grins. these are realistic gains as some will tell you the tb plen is 15bhp the remap 25 bhp and the exhaust 15bhp but you cant just add them all together. the main thing your looking for on a fast road car is low and mid range gains.
Prices vary hugely for all the components , I went with IPD which is about £800ish for the throttlebody plenum and hose and resinator cap , bmc air filter £60, remaps again vary, mine was done by DMS automotive and was about £600 but you can get a remap for £250 and up depends if you want off the shelf or a custom to your cars specific set up. and a sports exhaust with 200 cell cats would add more to the low mid range and can be from £700 up to £2000 and lots higher than that even. again I went with a valvetronic set up from topgear so I can turn the loud off if I want to that would cost around £1200/1500. I would suggest to anyone looking at these types of mods to start BMC/ K&N induction kit makes the engine breath much better adds a nice induction note and a few BHP SECOND do the sports exhaust and 200 cell cats as this is a straight fit and no remap needed the improved flow and lighter stainless steel makes a big difference the cats adding the most to that mod. finally the TB/PLEN and remap this give the best air intake with the better gas flow from the exhaust makes the car what it should have been from the factory without all the compromises from accountants, emissions legislation, and the sales guys not wanting base models to be too close to the flagship models.
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