Exhaust Mod on 996

[hendy]

Just wanted to share my experiences of late with people. I know that sports exhausts are one of the most common customisations that people on here do to their pride and joy and since buying mine just over a year ago, I have been constantly researching the options available to me. After the having a PSE fitted to My Boxster S, I knew that I needed a little more of a rumble on the 996.

Having narrowly missed out on a few ebay auctions I started looking into alternatives and liked the look of the Oettle job. This is a company in Germany that will modify the standard boxes, so that some of the exhaust bypasses the silencers. I have read a lot about it on Boxa.net and heard some of the results and liked it.

Anyway, I finally took the plunge yesterday and went down to Hayward and Scott (I am in no way associated with this company). They made a similar modification to my standard exhausts. I was in and out within a couple of hours and am really pleased wioth the results.

It's not as loud as the sports exhaust, but has a nice low rumble and sounds great on acceleration. Although when cruising at motorway speeds it isn't that much different to before the modification.

I know this wont increase the power and may still replace with sports exhaust at some point in the future but it was a lot cheaper than a full sports exhaust and I am very pleased with the result.

I have tried to include some image files below (first time posting images, so forgive me if they don't work).

And here is a little video of the sound whilst stationary on my driveway:

http://www.youtube.com/watch?v=YClPyJDCb60









Hope this is useful to people, feel free to ask me anyquestions if you are interested.

[hendy]

I paid 250 plus VAT for a Drive in Drive out service.

I was quoted 150 if I removed the boxes first.

I think a group of Boxster owners got together and negitiated a deal for 220 each, the discussion is on Boxa.net if you search for Hayward Scott

[hendy]

Yeah, that's all it is. A small one inch pipe on each box. My understanding is that it allows some of the exhaust (when under greater pressure) to pass straight into the exit without passing through the silencer.

[hendy]

Haven't had it measured for DBs

[hendy]

I did ask this and apparently the CAT is not bypassed, it is before the new pipe, so it will have no effect on the emissions.

[hendy]

Mine took a couple of hours or so. It wasn't that long.

Edited by hendy on Tuesday 25th August 15:49

[hendy]

RJ5560 said:

Hendy,

Just out of interest did you have to supply brackets / bolts to Hayward and Scott? I spoke to them some time ago and they said I would need to supply these myself (my car is a 99 C2 and the bolts etc will no doubt need cutting off).

Maybe they are now offering this as part of their drive in service?

Thanks

RJ5560

I didn't have to supply any bolts at all. I think they reused the originals, but couldn't be sure.

[hendy]

robmug said:

Hendy, I thought when I started to read this that you'd done the mod to the GT3...

No, it's a very old thread that got revived yesterday. I did consider something similar with the GT3, but I failed the static noise test last year at Bedford in the GT3 with the stock exhaust, so I think the only viable option is the switchable PSE if I want to continue tracking it.