Necessity of a CBE for a stage 2+ tune
#1
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Location: orange county
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My Ride: 2008 535xi wagon
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I will be making the switch from stage 1+ to stage 2+ as soon as I get my ar design DPs
But as of now I do not have a cat back exhaust system. I decided to go the cheaper route and just had my muffler deleted.
I realize the benefit of having a CBE but I have heard that the stock system isnt that restrictive to begin with.
Would it be safe to move to stage 2 w/o a cat back? If so, how much will a CBE help with performance once I have switched to stage 2+?
Thanks
![Stuart](https://5series.net/forums/images/smilies/imported/stuart.gif)
I realize the benefit of having a CBE but I have heard that the stock system isnt that restrictive to begin with.
Would it be safe to move to stage 2 w/o a cat back? If so, how much will a CBE help with performance once I have switched to stage 2+?
Thanks
![Smile](https://5series.net/forums/images/smilies/imported/smile.gif)
#2
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My Ride: Alpine E60, '09 535i-Premium, Sport and Comfort Access PackageMods: Lux H8 V3 Angel Eyes, Weisslicht LED license plate lights, Interior LED lights, RPI Scoop, Matte Black Grills, Smoked LED side markers & side reflectors, 35% tint all around, and a 3
![Default](https://5series.net/forums/images/icons/icon1.gif)
I will be making the switch from stage 1+ to stage 2+ as soon as I get my ar design DPs
But as of now I do not have a cat back exhaust system. I decided to go the cheaper route and just had my muffler deleted.
I realize the benefit of having a CBE but I have heard that the stock system isnt that restrictive to begin with.
Would it be safe to move to stage 2 w/o a cat back? If so, how much will a CBE help with performance once I have switched to stage 2+?
Thanks![Smile](https://5series.net/forums/images/smilies/imported/smile.gif)
![Stuart](https://5series.net/forums/images/smilies/imported/stuart.gif)
I realize the benefit of having a CBE but I have heard that the stock system isnt that restrictive to begin with.
Would it be safe to move to stage 2 w/o a cat back? If so, how much will a CBE help with performance once I have switched to stage 2+?
Thanks
![Smile](https://5series.net/forums/images/smilies/imported/smile.gif)
#3
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Join Date: Apr 2014
Location: orange county
Posts: 13
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My Ride: 2008 535xi wagon
![Default](https://5series.net/forums/images/icons/icon1.gif)
![Smile](https://5series.net/forums/images/smilies/imported/smile.gif)
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