Polybush exhaust rubbers, worthwhile?

Stormster

Stormster

Stormster

Soldato
Joined
18 Oct 2002
Posts
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Location
Stoke-on-Trent
What are the main benefit of these? Do they cause loads of vibration in the car?

My car is a Fiesta ST.

I wanna buy new rubbers because as expected my local powerflow made a dogs dinner of my new exhaust :o - they only needed to make me a centre section as I'd bought a Piper backbox - at first it was catching on the underside heatshields and resonating against the cars body and banging about if you got any wheelspin.

I had to go back and he has tweaked it, cut it down a smidge on the centre pipe so no more catching/resonating BUT:

1) When the exhaust cools down/goes cold, it rises up and pretty much touches the lower valance on my back bumper. When it warms up it drops a bit away from the valance.

2) It's now sitting crap anyway, its actually pointing in ever so slightly to the middle of the car! If anything you'd expect it to point a little towards the drivers side rear corner of the car.

3) He refused to change the rubbers (even offering him a new one which came with my Piper backbox which luckily he's not modified in any way) and the exhaust can wobble about a lot, if you get wheel hop pulling off quickly from junctions in the wet with a bit of wheelspin it still bangs under the car because it's so wobbly!

So, what are the benefits of poly exhaust rubbers? Or will OEM new ones do the job better? A mechanic friend is going to try and rehang it better when I get new ones. I'm not wasting my petrol or time off going back to the powerflow dealer.

Thanks :)
 
Thanks for the reply, my cars also got a miltek 60mm flexi pipe. The rubbers on there currently are the original ones, cars a 58 plate and done 45k so new OEM ones may be beneficial.

That reno exhaust moves a lot on the vid!
 
It's a bit bigger diameter so it seems from reading about quickly today it's not unheard of for them to catch the underside if you get a bit of wheel hop.

Still annoying and I'm disappointed at the centre pipe I had made.

The rubber posted above with alternate holes seems a clever idea, where can I get one of those?

Will, did you get any extra vibrations in the cabin with poly dogbone mount? The rubber has started to split on my dogbone mount so I need a new one anyway soon.
 
The centre pipe I asked them to make is a bodge (two bits welded together as he cant bend one long piece of steel twice!) and also the fitting is poor, the rounded out piece on the tailpipe catches the valance as he's cut a bit off the centre pipe to stop it catching the heatshields in turn making the backbox go up higher and close to the valance.

Not wasting my time going back lol. Gonna order standard rubbers and just a single poly one for the rear, as per the red one above with extra holes, to try and sit the backbox better :)
 
Yeah unique exhausts are the best around here definitely. Only problem is getting booked in quickly, busy bloke! Also he shuts up shop most summers to go welding on oil rigs, must get paid a bomb.

As said though, it's a case of finding a good franchise thats all, I wanted it on quickly and didn't pay much but just a bit of hassle getting it right, soon be sorted :)
 
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