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M444TTB said:I had my noise tested at Castle Combe today. Both time at just under 5,000rpm and static (measured from a metre I think). The car is a 996 3.6 within TopGear's 200 cell X-pipe cats and the valved boxes. With the valves open it was 105db and closed 97db. Suspect the gap may be larger under load for a drive-by reading though. 105db is bang on the limit for Castle Combe and they told me just go with it and we can black flag you if necessary.
MrC986 said:I'd thought I'd chip in with an update on my recent purchase, just as I'm mentally preparing to fit my 200 cell x-pipe cats & sports sound boxes. I bought the bits separately & was impressed by the speed of dispatch & how well wrapped the items were. I'm fortunate in that my
In comparison to OEM products, you get all the relevant clamps/bolts/gaskets that would otherwise cost you many £s. The bits I've purchased that I think I'll need in addition to the Topgear fittings, are new exhaust bracket bolts/nuts and that's again a touch of OCD/the thorough approach to this project. I've also opted for ease, to go the whole hog with new lambda sensors for the cats as it seems daft spending a decent amount on the cats/boxes to then shove 19 yr old sensors in the cats.
I'll post a pic and a sound clip hopefully when it's all fitted....
big_pete said:Hi I would be interested in 200 cell sports cats for my 997.1 Carrera S does anyone know how they are ?