Catless DP AFTER Exhaust...Sound Question?
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    I spend too much of my life on FST! galaxy7's Avatar
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    Catless DP AFTER Exhaust...Sound Question?

    For you guys that added a catless DP after a cat back exahust (brand irrelevant), how would you describe the sound/noise/tone/volume change? Did it make it a little or alot louder? Deeper tone? In car experience better/worse/indifferent? Etc?
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    trd
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    A LOT louder ( Borla CBE and I did high flow cat, I couldn't imagine catless at WOT)

    At idle it cruising it isn't that much different.

    Sent from my Pixel XL using Tapatalk

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    FST Senior Member grossber's Avatar
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    Quote Originally Posted by galaxy7 View Post
    For you guys that added a catless DP after a cat back exahust (brand irrelevant), how would you describe the sound/noise/tone/volume change? Did it make it a little or alot louder? Deeper tone? In car experience better/worse/indifferent? Etc?
    Def louder...in a good way. Same experience for me, no noise difference cruising, but if you get on it, its smile city...plus you can hear the turbo just whistling at startup ..i have the Cobb Catted.
    2015 Oxford White ST3
    Stratified Tuned - 91
    Cobb AP3 | Catted DP w/ defouler
    CPe 3.5" FMIC | Stage 1 RMM
    NGK Plugs
    Green Filter
    Res and Muffler Delete w/ Magnaflow Muffler
    JBR Short Shift Arm
    ST X Coilovers
    Sound Symposer Delete
    Gloss Black Wrapped Roof
    RS Hood Vents
    LED Interior Lights
    Yellow Lamin X Fogs

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    No really, it's INSANE how well the stock DP quiets the car down. I too had a Borla CBE, then threw a catlss DP later on and... BRBLBRBLBRBLRBLPOPPOPPOPOPOPOP

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    Quote Originally Posted by jacob914 View Post
    No really, it's INSANE how well the stock DP quiets the car down. I too had a Borla CBE, then threw a catlss DP later on and... BRBLBRBLBRBLRBLPOPPOPPOPOPOPOP
    Love to see these posts. Have a catless dp sitting in my room waiting to be Installed. I also have a borla cbe already installed. Can't wait to hear the results

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    I did catback (Roush) before downpipe, at low rpm's and load it's not a ton louder except you're gonna hear your turbo all the time now (think diesel bros) even at idle. BUT, when you press the sauce lever you're gonna be surprised, its gonna rasp and scream like a raped ape. Enjoy the noises and violating prius' ethics.
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    14' IS ST1
    Roush Intake____Steeda Symp. Delete & Clutch Spring
    & Catback____GF07 18x9 Wheels
    Stratified 9.0-E30
    Mountune RMM_____Painted Center Lip & Mirrors
    Cobb SS Plate, Tranny & Cable Bushings
    Boomba BOV & Shifter__CF Exhaust Trim
    ITV22's__Eagle Eye Projectors
    JPC Clutchline
    ___Cup Spoilers
    Beast FMIC_____Vega Diffuser, Splitter, Spoiler
    VellosaTech Snorkel
    ___Aeroflow Canards, Skirts
    Clubsport Suspension
    Stoptech Slotted Rotors
    Catless DP
    TB F/R Traction Bars
    wiper delete

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    I spend too much of my life on FST! mmst3's Avatar
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    Quote Originally Posted by JoshCrane1 View Post
    I did catback (Roush) before downpipe, at low rpm's and load it's not a ton louder except you're gonna hear your turbo all the time now (think diesel bros) even at idle. BUT, when you press the sauce lever you're gonna be surprised, its gonna rasp and scream like a raped ape. Enjoy the noises and violating prius' ethics.
    LMAO this is my favorite explanation HAHAHAHAHA
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    '17 MAGNETIC METALLIC ST3
    Turbosmart 50/50 BOV
    AWE Tuning Track Edition
    CJPP High Flow Catted Downpipe
    Maxton Design RS Rear Valance
    Maxton Design Front Splitter/Lip
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    Delta Styling Wing
    Airlift 3P

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    Supporting Member Algae Killer's Avatar
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    Quote Originally Posted by JoshCrane1 View Post
    I did catback (Roush) before downpipe, at low rpm's and load it's not a ton louder except you're gonna hear your turbo all the time now (think diesel bros) even at idle. BUT, when you press the sauce lever you're gonna be surprised, its gonna rasp and scream like a raped ape. Enjoy the noises and violating prius' ethics.
    This.

    With mine, I used the AWE Track Edition catback and mated it to an MBRP catless dp so basically all my exhaust has in it is the resonator that AWE uses and that's it so.....it's loud. How much turbo noise you will gain will depend a little on your catback choice but it's neat. Low rpm, the car just grumbles but you can still have a conversation around the car. Even going through town and shifting easy at lower RPM's the car still isn't crazy loud, but when you get on it and on mine it's about when you pass 3500 RPM is when the volume knob starts to really turn and goes up fast. Exhaust is just how your car farts and it's about flow, if you remove a fairly restrictive catted stock dp and replace it with a well bent dp with no cat, now your car can fart much better. So now instead of the ST being 'silent but deadly' now with no cat and a good cbe the ST will now let out some nasty sounds that will 'clear a room.' Lol, I have no idea where the fart comparison came from but that's how I see it

    Bottom line, it will be very much noticeably louder but more so at higher RPM but it will be louder across the board. It's awesome. Do it.
    2013 Focus ST ST3 Race Red 42,500mi

    Performance: COBB AP, Stratified Tuned for E30 & 93oct., MBRP catless DP, AWE Track Exhaust, NGK cold plugs, COBB Short Shift Plate 40% Reduction, Green Filter with lid off, Turbosmart 50/50 BOV, Boomba symposer delete, Steeda bracket bushings, Boomba trans. end bushings, CP-E Stage 2 RMM, Steeda clutch spring, HAWK drilled/slotted rotors with HAWK pads, General GMax AS-05 tires

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    Quote Originally Posted by trd View Post
    A LOT louder ( Borla CBE and I did high flow cat, I couldn't imagine catless at WOT)

    At idle it cruising it isn't that much different.

    Sent from my Pixel XL using Tapatalk
    Borla cbe here with cnt racing catless and it is stupid loud wot. Normal driving is good it’s only when wot. And with stratified crackles and pops it’s pops like crazy. Kinda obnoxious but of course I knew that and I still run it. Just kinda sketched about getting pulled for it one day. But as far as drivability after the downpipe. I feel like it’s more smooth with the shifts and with new tune its well put together and the car is a lot more smooth compared to the stage 1 Cobb ots
    Last edited by konaST704; 03-01-2019 at 04:07 AM.

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    FST Junkie! 1LoudST's Avatar
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    I noticed about 20% louder, 5% deeper, and about 30% more drone.

    MBRP 3" catback with a Depo Racing catless DP

    I will say this, coasting down, the crackles and pops are just heavenly!
    oVrKiLL likes this.

 

 
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