Joined: 24 Jan 2017 Posts: 346 Location: Sheffield
Posted: Wed Nov 06, 2019 7:23 pm Post subject: Are the exhaust bolts M8 x 35mm?
And if so how many will I need please?
I’ve just ordered TopGear CATS so I’ll be replacing all the fixing bolts as I’m guessing I’ll need my angle grinder more than my spanner when I dismantle things.
I’m not touching the manifold by the way!! _________________ 2002 Porsche 996 C2
heed Trainee
Joined: 24 Jan 2019 Posts: 72
Posted: Fri Nov 08, 2019 1:56 pm Post subject:
Yes they are M8 x 35MM. Part number 900 074 287 02
Six of them in total.
Since you're asking I assume you will source your own. But for the benefit of anyone else reading this, do not waste your money on these from Porsche. They charge over £5 a bolt!
When I took my cats of I nipped into Homebase (nearest place) and got some yellow zinc high tensile M8 x 35MM ones.
They looked exactly the same as the Porsche ones and cost about £5 for 8... _________________ '04 996 C4S, arctic silver, graphite grey
Hertsdriver Nürburgring
Joined: 12 Nov 2018 Posts: 476 Location: Hertfordshire/London
Joined: 24 Jan 2017 Posts: 346 Location: Sheffield
Posted: Fri Nov 08, 2019 4:43 pm Post subject:
Thanks both _________________ 2002 Porsche 996 C2
Hamster75 Spa-Francorchamps
Joined: 07 Sep 2017 Posts: 363 Location: Chester
Posted: Fri Nov 08, 2019 6:09 pm Post subject:
Are they the exhaust flange bolts & would they be the same on a 991 _________________ 991.1 C2S Red
997.2 C4 White
924 Blue
Lee997 Silverstone
Joined: 04 Apr 2019 Posts: 115
Posted: Fri Nov 08, 2019 8:59 pm Post subject: Bolts
Funnily enough I picked up various clamps and baskets so that I can re-gasket and replace clamps on my 997s exhaust as it’s leaking!
Picked up the bits from design 911 today but wouldn’t pay the £3 per bolt they wanted!
Having just read this thread iv3 just ordered 6x M8 x 35mm marine grade Ss nuts and bolts for the very job you are proposing.
Just cost me £2.99 with free P&p from our friendly auction site.
P9XX Newbie
Joined: 04 Oct 2018 Posts: 24 Location: Hertfordshire
Posted: Sat Nov 09, 2019 6:33 pm Post subject:
My 997 (so slightly off subject) had new steel cat. to silencer bolts fitted about 6 months ago and had begun to start corroding.
Replaced them all (6) with stainless steel about 5 weeks ago.
30 mm bolts and All Metal Locking Nuts via internet.
25 mm bolts from local screw fixing shop.
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