Thread: Aftermarket exhaust SDV6

I’ve still got the rear cans...
They and the rearward pipes weren’t damaged on mine at the time

Originally Posted by discorevy

I assumed the same and left the resonators on

The exhaust guy told me that he had left resonators off of a number of turbo diesel vehicles and had little impact on sound levels. I decided to have him leave them off but hold on to them just in case! As it worked out didn't need them. My D3 seems to breath a little better but that may be compared to the old squashed pipes.
From what I have read the D3 exhaust system already breaths pretty well.
If I could work out how to insert photos of the new system I would

I'd think if yours sounds about the same , that your main muffler and cat are still in place , there wouldn't be much restriction in the resonators because there are two of them and by the time the exhaust gases have got that far they have cooled significantly .

Originally Posted by discorevy

I'd think if yours sounds about the same , that your main muffler and cat are still in place , there wouldn't be much restriction in the resonators because there are two of them and by the time the exhaust gases have got that far they have cooled significantly .

Yes the replacement starts from the back of the center muffler with twin pipes.

If we could get 30 sets a local guy would make them .

Originally Posted by Owen

Went to an exhaust shop, $1500 replace main muffler back, no resonators, in Stainless.
Britpart unit including responators, in stainless, $1036 delivered.
Legendex system from genie, $2699
Legendex system from Roo systems, $2500

Still shopping

I've also looked at the Roo Systems Legendex SS system. They use a 409 SS and full mandrel bends. Price seems a bit high, 2.5K and you have to DIY. Ive just had the tow and economy ECU tune done by them, seems to work well, apparently works better with their exhaust fitted too....

I would definitely go SS, but you need to know what grade of stainless they are using. So far no issues with the factory set up, would love to have bit more noise though...

Eric

Originally Posted by Eric SDV6SE

I've also looked at the Roo Systems Legendex SS system. They use a 409 SS and full mandrel bends. Price seems a bit high, 2.5K and you have to DIY. Ive just had the tow and economy ECU tune done by them, seems to work well, apparently works better with their exhaust fitted too....

I would definitely go SS, but you need to know what grade of stainless they are using. So far no issues with the factory set up, would love to have bit more noise though...

Eric

The Britpart is 201 Stainless. The properties of 201 are a little better than 409 however they cant tell me the wall thickness to compare apples with apples.

I have been rethinking the stainless though re off road, I do have a few dings in the existing system from off road, maybe the pipes will get banged up before they rust, hence just go with steel.

Owen,

Someone at my current work recently upgraded their exhaust (larger dia. etc for better flow), and they were told to go with mild steel to avoid cracking, especially for off road use. My personal preference would be SS, just need to select the correct grade. I would also assume (rightly or wrongly) that companies like Roo Systems or Britpart would not offer SS systems without some significant R&D, as they have reputations at stake.

Due to EURO Emission standards compliance requirements, the factory cannot fit these high end free flowing systems as they have to cater for the entire range of driving styles and conditions, so its a compromise.

Also, if a full SS system (whatever grade) lasts the life of the vehicle, then i think its a good investment. I would hate to skimp on an exchaust, say pay 1200 for a mild steel system, then have to replace it again, (effectively spending 2400) when you pay 2500 for the same system in SS once.

Personally, I am saving for a SS free flow system, hope to get it at the end of 2018

Just my honest thoughts

Regards,

Eric