Remove middle box
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Stefan, unfortunately your question is not very clear.
Do you mean, "can the DPF box be replaced with a straight bit of pipe?" Could you clarify your question a bit?
If this is what you meant, the DPF can be removed and replaced with a straight bit of pipe, but the ECU will need re-programming.
Alfa Tuner I believe can supply these pipes, but I don't know where you would get your ECU re-programmed in Sweden.
Do you mean, "can the DPF box be replaced with a straight bit of pipe?" Could you clarify your question a bit?
If this is what you meant, the DPF can be removed and replaced with a straight bit of pipe, but the ECU will need re-programming.
Alfa Tuner I believe can supply these pipes, but I don't know where you would get your ECU re-programmed in Sweden.
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1,137 Posts
Thnk you for your patience!
Half way back to the back boxes there is a silencer ("middle box" = pdf?). To get more noise I'd like to take it away and replace it with a straight pipe or a less silencing silencer. Do I need to re program for that?
Half way back to the back boxes there is a silencer ("middle box" = pdf?). To get more noise I'd like to take it away and replace it with a straight pipe or a less silencing silencer. Do I need to re program for that?
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29,740 Posts
Sounds like just the middle box to me if it's half way back. 
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171 Posts
stevepen wrote;DPF is just for Diesels, so i'm sure your 1750 wont have one.
Whooops. I didn't spot it was a petrol.
Unfortunately I'm not familiar with petrols, so am unable to help.
I know there have been threads about putting on different exhaust pipes onto petrols on here, but am not sure if they were on a 1750?
Good luck
Whooops. I didn't spot it was a petrol.
Unfortunately I'm not familiar with petrols, so am unable to help.
I know there have been threads about putting on different exhaust pipes onto petrols on here, but am not sure if they were on a 1750?
Good luck
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171 Posts
Would these be any good?
Ragazzon Stainless Steel Sports Exhaust Duplex with 102mm Tail Pipes Alfa 159
I know you were asking about just removing a box, and not going about it this way, but thought I would post it anyway.
Ragazzon Stainless Steel Sports Exhaust Duplex with 102mm Tail Pipes Alfa 159
I know you were asking about just removing a box, and not going about it this way, but thought I would post it anyway.
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5,535 Posts
Hi there, the middle box should be the main silencer. You CAN cut that out and replace it with a straight pipe. However, if you did that to a 2.2 for example, it would be far too loud.
On the 1750 it might sound good but I don't know if it will be too loud. Only one way to find out! It may improve the engines breathing too. Though once you are finished with all your exhaust changes, you should get the engine remapped to get the most performance.
On the 1750 it might sound good but I don't know if it will be too loud. Only one way to find out! It may improve the engines breathing too. Though once you are finished with all your exhaust changes, you should get the engine remapped to get the most performance.
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30,096 Posts
IIRC, the middle box means back pressure & this means torque.
Wait until you move over here as there are two local places I can recommend in relation to good value custom exhausts
Wait until you move over here as there are two local places I can recommend in relation to good value custom exhausts
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422 Posts
Back pressure on turbocharged engines isn't good. It makes the turbo spool slower.IIRC, the middle box means back pressure & this means torque.
Wait until you move over here as there are two local places I can recommend in relation to good value custom exhausts
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What he said! You want minimal back pressure on a turbo. :thumbs:
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Yes, so you could cut out the middle box completely and just replace it with a piece of pipe, but be ready to fit a more free-flowing centre silencer (i.e. a straight through silencer box) if it turns out that the system is too loud.
NB, you need to drive around for a good half hour to see if it is too loud. The sound proofing on the Brera is so good that when I had my very loud exahust system (made by Torque Exhausts), it did not seem loud in the cabin, but after about 20 minutes it started to give me a headache
Basically, you're going to have to do the experiments on the 1750 which I did on the 2.2. It can take a while to get it just right, but once you do, it's really worth it :thumbs:
NB, you need to drive around for a good half hour to see if it is too loud. The sound proofing on the Brera is so good that when I had my very loud exahust system (made by Torque Exhausts), it did not seem loud in the cabin, but after about 20 minutes it started to give me a headache
Basically, you're going to have to do the experiments on the 1750 which I did on the 2.2. It can take a while to get it just right, but once you do, it's really worth it :thumbs:
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25,677 Posts
CF do you have a video of what yours sound like?Yes, so you could cut out the middle box completely and just replace it with a piece of pipe, but be ready to fit a more free-flowing centre silencer (i.e. a straight through silencer box) if it turns out that the system is too loud.
NB, you need to drive around for a good half hour to see if it is too loud. The sound proofing on the Brera is so good that when I had my very loud exahust system (made by Torque Exhausts), it did not seem loud in the cabin, but after about 20 minutes it started to give me a headache
Basically, you're going to have to do the experiments on the 1750 which I did on the 2.2. It can take a while to get it just right, but once you do, it's really worth it :thumbs:
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814 Posts
Vortex exhausts apparently works incredibly well in terms of reducing back pressure for turbo'd cars..... My brother has it on his 20vt coupe and it is unbelievable. Does sound a bit like a jet engine tho
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