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[JamesV6CDX]

I just pulled up outside work, standing outside the car I thought - this exhaust sounds a bif "fruity" !  

Looked under the car, and the mid-section pipe has completely corroded away where it joins the backbox - basically it's not even meeting the backbox, and the pipe is just wiggling free, fumes from the passenger bank are not even going through the rear silencer.

Question 1 - is this likely to be affecting the running / performance / economy of the car in any way at all?

Question 2 - Exhaust options. Am I right in thinking facelift exhaust is different to pre-facelift, and they are not interchangable?

[VXL V6]

Not really much help but I know the 3.2 is different as it has a different CAT setup.

I would have thought the Backboxes are all pretty similar, 3.2 has twin tailpipes but it's more cosmetic than anything else!

Oh and any holes in the exhaust will alter the back pressure which will alter performance and economy.

[Baz006]

Hi James. I guess the detatchment of the pipe from the back box would be likely to affect performance to some degree. A few weeks ago all the wadding started blowing out of mine. Every time I went somewhere it looked like I had just run over a blonde, with the stuff trailing behind. I have noticed a decrease in performance and mpg but not to a serious degree. Not too familiar with the joint at the backbox. Is it a flange on a stub? Has the flange corroded on the centre section? This may mean a replacement centre section as well as the backbox.

[JamesV6CDX]

Hi James. I guess the detatchment of the pipe from the back box would be likely to affect performance to some degree. A few weeks ago all the wadding started blowing out of mine. Every time I went somewhere it looked like I had just run over a blonde, with the stuff trailing behind. I have noticed a decrease in performance and mpg but not to a serious degree. Not too familiar with the joint at the backbox. Is it a flange on a stub? Has the flange corroded on the centre section? This may mean a replacement centre section as well as the backbox.

Oh yes.... it needs a whole new exhaust alright!!

[JamesV6CDX]

From BuyPartsBuy:

GM173X      £37.72 - drivers centre section
GM174W     £35.6  - pass side centre section
GM175V      £34.52 - Backbox
GMR71 x 8  £3.84  - Rubbers


£111.68 EX VAT

£131.22 INC VAT

[JamesV6CDX]

I guess GM will be the way to go though, at twice this price  

[Baz006]

From BuyPartsBuy:

GM173X      £37.72 - drivers centre section
GM174W     £35.6  - pass side centre section
GM175V      £34.52 - Backbox
GMR71 x 8  £3.84  - Rubbers


£111.68 EX VAT

£131.22 INC VAT

Well dont suppose thats too painfull £131.22 inc VAT....... 8-)

[JamesV6CDX]

From BuyPartsBuy:

GM173X      £37.72 - drivers centre section
GM174W     £35.6  - pass side centre section
GM175V      £34.52 - Backbox
GMR71 x 8  £3.84  - Rubbers


£111.68 EX VAT

£131.22 INC VAT

Well dont suppose thats too painfull £131.22 inc VAT....... 8-)

Obviously that's plus delivery, plus DIY fitting, but it could be worse!

Suspect I will be persuaded to splash out on genuine GM parts though...  

[Baz006]

From BuyPartsBuy:

GM173X      £37.72 - drivers centre section
GM174W     £35.6  - pass side centre section
GM175V      £34.52 - Backbox
GMR71 x 8  £3.84  - Rubbers


£111.68 EX VAT

£131.22 INC VAT

Well dont suppose thats too painfull £131.22 inc VAT....... 8-)

Obviously that's plus delivery, plus DIY fitting, but it could be worse!

Suspect I will be persuaded to splash out on genuine GM parts though...  

Oh well, I know what option I'd go for...........yup, rolling about the floor on cold wet day with the smell of WD40, skinned knuckles and back ache..... .......rather than give my hard earned to GM..... :-/

[JamesV6CDX]

From BuyPartsBuy:

GM173X      £37.72 - drivers centre section
GM174W     £35.6  - pass side centre section
GM175V      £34.52 - Backbox
GMR71 x 8  £3.84  - Rubbers


£111.68 EX VAT

£131.22 INC VAT

Well dont suppose thats too painfull £131.22 inc VAT....... 8-)

Obviously that's plus delivery, plus DIY fitting, but it could be worse!

Suspect I will be persuaded to splash out on genuine GM parts though...  

Oh well, I know what option I'd go for...........yup, rolling about the floor on cold wet day with the smell of WD40, skinned knuckles and back ache..... .......rather than give my hard earned to GM..... :-/

There is no question of that - fitting I will do.

However, I think the parts may still need to be from GM.

[Baz006]

From BuyPartsBuy:

GM173X      £37.72 - drivers centre section
GM174W     £35.6  - pass side centre section
GM175V      £34.52 - Backbox
GMR71 x 8  £3.84  - Rubbers


£111.68 EX VAT

£131.22 INC VAT

Well dont suppose thats too painfull £131.22 inc VAT....... 8-)

Obviously that's plus delivery, plus DIY fitting, but it could be worse!

Suspect I will be persuaded to splash out on genuine GM parts though...  

Oh well, I know what option I'd go for...........yup, rolling about the floor on cold wet day with the smell of WD40, skinned knuckles and back ache..... .......rather than give my hard earned to GM..... :-/

There is no question of that - fitting I will do.

However, I think the parts may still need to be from GM.
[/quote


But at least you'll have peace of mind that it wont be fitted by numptys........

[Marks DTM Calib]

Example one....

Cheap(ish) after market exhaust fitted to an Omega saloon at a octs of over 250 quid.

Less than two years later all the inetrnal baffles have collapsd and its sounds awful.

Example two...

Gm exhaust fitted three yers ago at a cost of under 250 quid.

3 years on and its still in excellent condition.



Its a no brainer.

[JamesV6CDX]

Thought so Mark

The exhaust on my 3.0 is GM, and in good nick, I'm half tempted to fit that !!

[TheBoy]

Don't. Its a nice car. Don't ruin it just to save a few quid (which it won't). You have TC, use it!

[The Cambelt Kid]

GM all the way matey, you'll be sorry otherwise and end up splashing out more in the long run.