lunchboxbill

My car has been making a "tinny" noise when warm. It got slightly embarrasing so I took it in this morning only to be told she's blowing a bit. Mechanic reckons something has corroded inside the exhaust that's making the noise.

Nothing detrimental that needs fixing right away, but none the less needs fixing.

Any recommendations for a sports exhaust upgrade?? (No heat exchangers required)

Its a 1991 964 C4

Nothing expensive, the car is for sale after all. But if I can get something good for a decent price then all the better.

Cheers,

Kieran.

mr pg

There's a number of primary and secondary exhausts on ebay at the moment. Alternatively, you replace the defective one with cup bypass, or G pipe.

Andy Roe

Try the scrappers for a used part, or as mr pg said, just fit a by-pass pipe on the offending silencer.

lunchboxbill

Does anyone have a picture of the underside of a standard 964 and I can point out the part that needs replacing?

Andy Roe

Not the underside of the car, but you should be able to point out which bit it is!

tbennett017

Tinny sound: Is there any chance it is one of the heat shields? That can be tacked back together with a weld or two...

I replaced #8 ^^^ with a cup pipe. I love the sound, and it is a lot lighter than the stock muffler.

There are lots of stock exhaust bits available on ebay etc. Don't buy new.

lunchboxbill

i know its not a heat shield as I only have 1 left on (the others came off earlier in the year and are currently in my cellar) and the mechanic checked that and said it was on nice and tight.

From the image above, I think i'm after replacing the final muffler (number 9)

Andy Roe

OK, then it's either a G-Pipe or a second hand one off of ebay or the like!

lunchboxbill

G-Pipe sounds tempting, but have seen a couple of mufflers on ebay for $150 - decisions decisions!

lunchboxbill

ok - i'll probably do some searching on this topic too, but what are the pro's/cons of fitting a g pipe, whilst i'm at it should i bypass ther secondary muffler to, how much will this affect emissions?

mr pg

Have you ever heard a car with cup bypass and G pipe?! One or other is fine, but both and you won't be getting on with your neighbours.

mr pg

Keep an eye on this:
http://cgi.ebay.co.uk/G-Pipe-Porsche...1%7C240%3A1318

lunchboxbill

i don't care too much about my neighbours, we might be moving anyway

is the noise without both still legal (in the UK)?

it looks like for £400 i could get both done, or do i just do the g-pipe for now half the price as thats where the problem currently is

Jim Howley

I would just do the G-Pipe, a straight through exhaust is way too loud for normal driving. Try German ebay as well, always well priced parts on there.

dfinnegan

Any chance you would be interested in selling the heat shield/tin bits?