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Author Topic: For those of you running catless on a stock catback  (Read 286 times)

Offline Mossdahaus

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For those of you running catless on a stock catback
« on: May 20, 2019, 06:43:57 PM »
Looking to add my next round of mods and have been doing lots of reading on this forum about catted vs catless.

Some say catless with stock catback is great and some say there is rasp. Trying to narrow it down before spending the money.

Anyone care to share a video?
« Last Edit: May 21, 2019, 02:35:42 AM by Mossdahaus »
2015 Taurus SHO - Performance Pkg & Nav

SW catted DPs, SP542 Plugs, 170 tstat, 3bar sensor, K&N drop in, JLT catch can & Unleashed 93 tune

Coming Soon: GH Intercooler

Offline 802SHO

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Re: For those of you running catless on a stock catback
« Reply #1 on: May 21, 2019, 03:26:02 PM »
Only video I have of my exhaust when it was catless downpipes to stock catback...with muffler deletes...sounded completely fine.  If you still have mufflers you're most definitely fine! 

https://youtu.be/M3Ahk0j-mw4
2010 SHO non PP, GH upgraded turbos, GH upgraded IC, Alky Control Methonal Injection, Gen2 torque mounts, SP542 .028, 160 T, Airaid Intake, 3bar, Thunderstorm Catless Downpipes, custom stainless 2.5" double xpipe w/muffler deletes 4" quad tips, UPR Dual Valve Catch Can, 13+ PP Trans Cooler, Econoaid throttle Body Booster, Mickey Thompson 20x9 SC-5 Wheels, Continental Extreme Contact DW tires F: 245/40/20 R: 275/35/20, H&R Springs all around w/rear cut 1/2", Aeroforce Interceptor Gauge, Tuned by AJP Turbo

463awhp 569 awtq mustang dyno 6/13/19

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Offline FiveLeeter918

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Re: For those of you running catless on a stock catback
« Reply #2 on: May 23, 2019, 11:54:34 AM »
I'll have to find a view on my phone but I have Stainless Works offroad DPs with stock catback (third cat and all) and I like it. 3/4 throttle at 2000 rpm has a little rasp but rarely there so it doesn't bother me. No drone and sounds great at wot.
- Lee
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Offline shoNoff

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Re: For those of you running catless on a stock catback
« Reply #3 on: May 23, 2019, 01:57:13 PM »
I have ssw catted on stock catback with 3rd cat still. Besides cold start you canít even tell I have exhaust on the car. I can take a video if you like.
2013 SHO PP 12.51 @ 110.07 AJP turbo

Offline Mossdahaus

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Re: For those of you running catless on a stock catback
« Reply #4 on: May 31, 2019, 04:51:37 AM »
I have ssw catted on stock catback with 3rd cat still. Besides cold start you canít even tell I have exhaust on the car. I can take a video if you like.

Took your recommendation and ordered a set of SW carted downpipes. Even though the catless users say there is minimal rasp, I cannot stand the fact there is any. Getting installed next Wednesday.
2015 Taurus SHO - Performance Pkg & Nav

SW catted DPs, SP542 Plugs, 170 tstat, 3bar sensor, K&N drop in, JLT catch can & Unleashed 93 tune

Coming Soon: GH Intercooler

Offline shoNoff

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Re: For those of you running catless on a stock catback
« Reply #5 on: May 31, 2019, 07:02:35 AM »
You will love it as long as quiet is what you are looking for. Like I said at cold start you can tell you changed the exhaust. Once it warms you canít even notice. The only thing you get is a slight whistle from the turbos when driving. The Sswís are a very well built piece. Hopefully you are just as happy with them.
2013 SHO PP 12.51 @ 110.07 AJP turbo

 

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