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Old 17th August 2018, 06:42   #21
Lord of Hog
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If you want the engine to be less asthmatic then a stainless cat-back system is the way to go. Removing the secondary (middle) silencer will of course result in a louder exhaust note, particularly if you're then tempted to go for a nice big shiny tailpipe or two but you will notice the difference in response and fuel consumption.

I'm saving up to have my 2.5 done at my local people (Redhill Classics) but they've already done my Mk1 Outlander. Performance is much livelier now and I reckon I'm getting a 7 - 10% increase in mpg depending on what sort of driving I do. It also now sounds like the EVO it always wanted to be!
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Old 17th August 2018, 07:37   #22
Dorchester2
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Quote:
Originally Posted by marinabrian View Post
I have never ever encountered any car, irrespective of make or model that when fitted with a SS exhaust, is quieter than a mild steel version.

Oh and before you say it, three of my four R40 have stainless exhausts fitted, and the fourth has an original system.

By a country mile the original system is the most pleasant of the lot, even if it is 14 years old.

Brian
Well I've never thought or said that a SS exhaust was quieter than a original mild steel one. Just hoping it has a nice snoring sound but nevertheless not too loud. Anyway the 75 Cowley cabin is very well soundproof.

Moreover I didn't want to change my very rusted line any more that's why I've opted for an everlasting one (fingers crossed!), or at least lasting as long as the car itself (fingers crossed once more!).

But I don't understand why you say that the original system is better when you've changed 3 times out of 4 for a SS one...
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
  • This vehicle was the 7,517th 75 to run off the production line, out of 112,381
  • This vehicle was the 1,190th 75 2.5 V6 Contemporary to be made out of 8,214
  • This vehicle was the 2,032nd 75 in Atlantic Blue Pearlescent (code: JEY) to be made out of 2,572 Atlantic Blue Pearlescent 75s
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Old 17th August 2018, 07:46   #23
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Quote:
Originally Posted by Lord of Hog View Post
If you want the engine to be less asthmatic then a stainless cat-back system is the way to go. Removing the secondary (middle) silencer will of course result in a louder exhaust note, particularly if you're then tempted to go for a nice big shiny tailpipe or two but you will notice the difference in response and fuel consumption.

I'm saving up to have my 2.5 done at my local people (Redhill Classics) but they've already done my Mk1 Outlander. Performance is much livelier now and I reckon I'm getting a 7 - 10% increase in mpg depending on what sort of driving I do. It also now sounds like the EVO it always wanted to be!
The SS exhaust I've bought is, as they say, less restrictive. Then by law we are not allowed to remove (or change significantly) anything out of the exhaust line. Moreover my original 19 years old line (but the back box that had obviously been changed once for another identical Rover one) was badly rusted and had to go.
Living overseas, I'd no other choice to get another good one for a decent price. Would I be tempted to ask in France for a custom made one, not sure I would find somebody keen to do it, or even so it would be awfully expensive.

Thank you for your experience report. I hope a little mpg improvement as well: that is the main purpose of the swap. Hope springs eternal...
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
  • This vehicle was the 7,517th 75 to run off the production line, out of 112,381
  • This vehicle was the 1,190th 75 2.5 V6 Contemporary to be made out of 8,214
  • This vehicle was the 2,032nd 75 in Atlantic Blue Pearlescent (code: JEY) to be made out of 2,572 Atlantic Blue Pearlescent 75s

Last edited by Dorchester2; 17th August 2018 at 07:51..
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Old 17th August 2018, 19:11   #24
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Quote:
Originally Posted by Dorchester2 View Post
Well I've never thought or said that a SS exhaust was quieter than a original mild steel one. Just hoping it has a nice snoring sound but nevertheless not too loud. Anyway the 75 Cowley cabin is very well soundproof.

Moreover I didn't want to change my very rusted line any more that's why I've opted for an everlasting one (fingers crossed!), or at least lasting as long as the car itself (fingers crossed once more!).

But I don't understand why you say that the original system is better when you've changed 3 times out of 4 for a SS one...
The reason for changing was because three out of the four had poor quality aftermarket mild steel systems fitted that were at end of life

If the original system had still been fitted, I would have taken time to carefully remove any grotty steel from the outer sarcophagus, and weld in new metal.

One may question why this is preferable to a stainless system, quite simply the difference in noise levels between an OEM system , and an aftermarket mild steel, or stainless system are like chalk and cheese

Brian
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Old 17th August 2018, 20:28   #25
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I like my stainless from Tony Banks, but then my old one was half rotten original, half rotten aftermarket, so I had to do something! It doesn't seem much more noisy on tick over or tootling along, but when I accelerate it definitely growls more, which I'm sad to say I rather like heheheh
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Old 17th August 2018, 20:33   #26
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I like the stainless one on my gold diesel - No silencers at all.
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Old 18th August 2018, 09:00   #27
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Hello .look here 200 livre original


https://tazoparts.co.uk/collections/mg-zt-rover-75
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Old 29th August 2018, 19:40   #28
Dorchester2
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Smile MIJ Exhaust stainless steel

Here it is & well fitted:








Unlike what I may have read here & there, this SS exhaust delivers a mild and soft roar when idle. And driving from the cosy interior I've been hardly able to tell the difference between the old metal one & the new SS. But today I didn't go up more than 3k revs!
I'm relieved: I'd feared it might be too noisy...
I'm a happy bunny!
EDIT: http://arnaud.aurejac.free.fr/Rover/SSexhaust.mp3
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
  • This vehicle was the 7,517th 75 to run off the production line, out of 112,381
  • This vehicle was the 1,190th 75 2.5 V6 Contemporary to be made out of 8,214
  • This vehicle was the 2,032nd 75 in Atlantic Blue Pearlescent (code: JEY) to be made out of 2,572 Atlantic Blue Pearlescent 75s

Last edited by Dorchester2; 29th August 2018 at 20:36..
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Old 30th August 2018, 14:26   #29
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Looks good fitted.

To answer your previous reply, no I wouldn't buy a new car with dents and scratches and I would have been miffed myself if a nice shiny exhaust turned up at my house damaged.

I'm after one for my MG ZT-T but I want a single exit pipe, large oval.

Plus a sporty sounding one, I know I should act my age but life is for living.
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Old 30th August 2018, 15:03   #30
Dorchester2
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Thank you for that.

As far as I'm aware of MIJ Exhausts are doing a large quantity of different SS cat back & lines: just have a try typing "MIJ Exhausts" on Youtube...
And they're doing sporty ones as well.
BTW I haven't got any shares in that venture... unfortunately!
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
  • This vehicle was the 7,517th 75 to run off the production line, out of 112,381
  • This vehicle was the 1,190th 75 2.5 V6 Contemporary to be made out of 8,214
  • This vehicle was the 2,032nd 75 in Atlantic Blue Pearlescent (code: JEY) to be made out of 2,572 Atlantic Blue Pearlescent 75s
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