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Are the exhaust bolts M8 x 35mm?

G

Grey996

Nurburgring
Joined
24 Jan 2017
Messages
394
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!!
 
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...
 
Are they the exhaust flange bolts & would they be the same on a 991
 
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.
 
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-META...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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