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Grey996
Spa-Francorchamps


Joined: 24 Jan 2017
Posts: 346
Location: Sheffield


PostPosted: Wed Nov 06, 2019 7:23 pm    Post subject: Are the exhaust bolts M8 x 35mm? Reply with quote

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!!
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2002 Porsche 996 C2
 
  
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heed
Trainee


Joined: 24 Jan 2019
Posts: 72



PostPosted: Fri Nov 08, 2019 1:56 pm    Post subject: Reply with quote

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...
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'04 996 C4S, arctic silver, graphite grey
 
  
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Hertsdriver
Nürburgring


Joined: 12 Nov 2018
Posts: 476
Location: Hertfordshire/London

2004 Porsche 997 Carrera 2

PostPosted: Fri Nov 08, 2019 4:33 pm    Post subject: Reply with quote

stainless bolts, brass nuts Thumb
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My 997.1 C2 ownership thread: http://911uk.com/viewtopic.php?t=134228
 
  
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Grey996
Spa-Francorchamps


Joined: 24 Jan 2017
Posts: 346
Location: Sheffield


PostPosted: Fri Nov 08, 2019 4:43 pm    Post subject: Reply with quote

Thanks both
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Hamster75
Spa-Francorchamps


Joined: 07 Sep 2017
Posts: 363
Location: Chester


PostPosted: Fri Nov 08, 2019 6:09 pm    Post subject: Reply with quote

Are they the exhaust flange bolts & would they be the same on a 991
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991.1 C2S Red
997.2 C4 White
924 Blue
 
  
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Lee997
Silverstone


Joined: 04 Apr 2019
Posts: 115



PostPosted: Fri Nov 08, 2019 8:59 pm    Post subject: Bolts Reply with quote

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.
 
  
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P9XX
Newbie


Joined: 04 Oct 2018
Posts: 24
Location: Hertfordshire


PostPosted: Sat Nov 09, 2019 6:33 pm    Post subject: Reply with quote

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.

https://www.ebay.co.uk/itm/ALL-METAL-SELF-LOCKING-NUTS-METRIC-A2-STAINLESS-STEEL-M3-M4-M5-M6-M7-M8-M10-M12/161748903172?hash=item25a8fc6504:m:mXNVEkt7gyAPgTm5wkX0HOA

Went for Lock Nuts rather than plain.
These suckers go on tight and should never fall off.

Lower bolts easy. Top, difficult.
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2008 997.2 C2S PDK Basalt Black
 



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