Borla Pro XS muffler gains?
#1
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Borla Pro XS muffler gains?
Hi all,
Just was curious on what kind of gains would I get with replacing the stock mufflers with a set of Borla Pro XS. My last ISF had straight pipes and I hated the loudness and drone. The setup i have now with the Borlas have almost the perfect sound I was looking for. A nice deep hum. I wanted to do an axel back setup but the exhaust shop guy said that it won't make much of a difference with the crush Y bend.
I'm also looking to get a set of PPE catless headers but wanted to keep the stock piping and resonator. My goal is to keep that nice deep hum but I also want some power gains. Thanks again for the input!
Just was curious on what kind of gains would I get with replacing the stock mufflers with a set of Borla Pro XS. My last ISF had straight pipes and I hated the loudness and drone. The setup i have now with the Borlas have almost the perfect sound I was looking for. A nice deep hum. I wanted to do an axel back setup but the exhaust shop guy said that it won't make much of a difference with the crush Y bend.
I'm also looking to get a set of PPE catless headers but wanted to keep the stock piping and resonator. My goal is to keep that nice deep hum but I also want some power gains. Thanks again for the input!
#2
I just went through this and here's my recommendation.
1. If you're getting headers, get a QUIET exhaust because it WILL BE loud afterward.
2. With the mufflers, get the shortest you can. I went with the Magnaflow 12226 and would probably go with the round 5" if I did it again due to the fitment. It's a tight fit end to end down there as well.
3. I kept the resonator and mid pipe as it's already 2.5" and rebuilt behind that.
4. The Y pipe needs to go. REdo the muffler from the flange back or there's a lot of restriction. Get a 2.5" Y and rebuild it all. it's not that much more work.
Listen to these with a good speaker system on your computer.
With JUST the mufflers swapped. 2.5" y pipe:
With PPE Headers and the same exhaust setup:
1. If you're getting headers, get a QUIET exhaust because it WILL BE loud afterward.
2. With the mufflers, get the shortest you can. I went with the Magnaflow 12226 and would probably go with the round 5" if I did it again due to the fitment. It's a tight fit end to end down there as well.
3. I kept the resonator and mid pipe as it's already 2.5" and rebuilt behind that.
4. The Y pipe needs to go. REdo the muffler from the flange back or there's a lot of restriction. Get a 2.5" Y and rebuild it all. it's not that much more work.
Listen to these with a good speaker system on your computer.
With JUST the mufflers swapped. 2.5" y pipe:
With PPE Headers and the same exhaust setup:
#3
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I have the borla pro xs mufflers right now on my F and I love it. It's definitely on the quieter side of mufflers and it flows very good. I remember reading an article where they tested many types of mufflers to see which one flows better. The borla had the best flow rate.
#5
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I just went through this and here's my recommendation.
1. If you're getting headers, get a QUIET exhaust because it WILL BE loud afterward.
2. With the mufflers, get the shortest you can. I went with the Magnaflow 12226 and would probably go with the round 5" if I did it again due to the fitment. It's a tight fit end to end down there as well.
3. I kept the resonator and mid pipe as it's already 2.5" and rebuilt behind that.
4. The Y pipe needs to go. REdo the muffler from the flange back or there's a lot of restriction. Get a 2.5" Y and rebuild it all. it's not that much more work.
Listen to these with a good speaker system on your computer.
With JUST the mufflers swapped. 2.5" y pipe:
Lexus isf magnaflow 12226 - YouTube
With PPE Headers and the same exhaust setup:
Isf ppe headers magnaflow exhaust - YouTube
1. If you're getting headers, get a QUIET exhaust because it WILL BE loud afterward.
2. With the mufflers, get the shortest you can. I went with the Magnaflow 12226 and would probably go with the round 5" if I did it again due to the fitment. It's a tight fit end to end down there as well.
3. I kept the resonator and mid pipe as it's already 2.5" and rebuilt behind that.
4. The Y pipe needs to go. REdo the muffler from the flange back or there's a lot of restriction. Get a 2.5" Y and rebuild it all. it's not that much more work.
Listen to these with a good speaker system on your computer.
With JUST the mufflers swapped. 2.5" y pipe:
Lexus isf magnaflow 12226 - YouTube
With PPE Headers and the same exhaust setup:
Isf ppe headers magnaflow exhaust - YouTube
Are you full cat less in your set up? Any issues with the CEL?
Thanks for reply all!
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#9
Thanks! It was your original thread earlier that made me decide on that setup. I was going with the Magna but due to time and circumstances the Borla was the closest thing they had to it. Love the sound! I didn't know the Y bend was so restrictive, good to know
Are you full cat less in your set up? Any issues with the CEL?
Thanks for reply all!
Are you full cat less in your set up? Any issues with the CEL?
Thanks for reply all!
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