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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 10-18-2013, 09:51 PM   #1
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Stock exhaust modification. Cat Delete.

Has anyone simply deleted the cats out of their Header and Front pipe? Couldn't really find anything on this.
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Old 10-22-2013, 09:00 PM   #2
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No one??? This really surprises me! I'm highly interested to see if it makes an improvement in power.
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Old 01-17-2014, 01:27 AM   #3
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^Hello OP, I removed the secondary catalytic converter on the front pipe. I retained the small muffler on the front pipe. Sound wise it is pretty much as quiet as stock, but there is a better response or perhaps a slight gain in power around 2500-3000rpm. Everything else is stock, 6AT

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Old 01-17-2014, 10:24 AM   #4
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OP, I deleted all the cats and installed Borla UEL headers. Kept the stock muffler setup though. Used the Borla overpipe/frontpipe cat delete combo pipe. Let me know if you have any questions!
[ame="http://www.youtube.com/watch?v=XYwKFBJjn6A"]IMG 0785 - YouTube[/ame]
[ame="http://www.youtube.com/watch?v=2cDD7UpPdrE"]IMG 0784 - YouTube[/ame]
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Old 01-17-2014, 11:23 AM   #5
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Perrin did this a while back, but did not notice any real performance gains on the dyno. I will have to try to dig up his blog post on that.
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Old 01-17-2014, 12:27 PM   #6
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I'll agree to that, the ol' butt dyno tells me there is def a little more torque in the lower end, got rid of the dip a little. Nothing drastic though, obiviously.
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Old 01-17-2014, 04:04 PM   #7
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Garage
nelsmar deleted cats off his stock pipes and found with tune it got the same hp as his revworks header and nameless front pipe combo.

http://www.ft86club.com/forums/showthread.php?t=55770
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Old 01-17-2014, 05:36 PM   #8
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O god someone resurrected this? Looks at the other topics.
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