MPx Side Exit Exhaust w/ Cat Downpipe, 03-05 Neon SRT-4

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Model Number: 220913-CN

This listing is for the MPx Side Exit Exhaust WITH Cat Downpipe. The product photo shows a catless downpipe, but those are no longer available.

Introducing the MPx 3.0" Side Exit Exhaust System for the 03-05 Neon SRT-4. If you're looking for an aggressive sounding exhaust, you've found it!

Instead of using a rear exit exhaust, we've designed an exhaust that exits on the driver's side of the vehicle, just in front of the rear wheel. This provides the shortest path for the exhaust to exit, thereby increasing throttle response and power.

We've seen a lot of side exit exhausts in the past, but they always seemed poorly executed. They were angled down to clear the side skirts, or wobbled due to poor hangers. We made sure to eliminate those problems by doing the following:

  • The industry's first notched side exit exhaust gets the exhaust tip very close to the side skirt, but provides plenty of clearance so the exhaust won't contact your side rails or side skirts.
    This notch does NOT restrict power. We gained a solid 11 HP over the previous 2.5" exhaust our test car had on it!
  • We provide a hanger system, rubber hanger, and hardware to prevent the exhaust from rocking back and forth.

Downpipe Options:

  • Additional O2 Sensor Bung for use with an Air / Fuel Ratio Gauge. Please note, this custom service may require an additional 2-3 days.

Video - Drive By:

Video - Idle:

If you are located outside of the continental USA, this item cannot be shipped by USPS and must be shipped by Fedex/DHL, and it will be quite expensive. Contact us via email to discuss further if you are outside of the continental USA.


Additional Options

Install Add'l O2 Sensor Bung

Model Number: 601904-WIDEBAND
Have an additional O2 sensor bung installed for use with an air / fuel ration gauge. Please note this custom service may Read more

MPx 3.0" O2 Housing, 03-05 Neon SRT-4 / 03-07 PT Cruiser GT

Model Number: 220915
Want the fastest turbo spool up, and throttle response you can get out of your factory turbo on your 03-05 Dodge SRT-4, Read more

MPx 3.0" 4-Bolt Exhaust / 03-05 SRT-4 O2 Housing Gasket

Model Number: 220915-GASKET
Do you need a replacement 4-Bolt O2 Housing Gasket for your 03-05 Neon SRT-4 or 03-07 PT Cruiser GT? We offer Read more

MPx Side Exit Exhaust w/ Cat Downpipe, 03-05 Neon SRT-4, Exhaust: Store Name

Ask a Product Question

  • Anonymous
    does it bolt on to stock
    1 Answer
    • Modern Performance

      This exhaust kit will bolt onto the factory turbo and o2 housing, as well as any bigger turbo kit that has a o2 housing with 4 bolt flange like the factory o2 housing.
  • dan
    Do i need to buy the cat or will the stock one work
    1 Answer
    • Modern Performance

      The stock downpipe will not work with the MPx side exit exhaust. You need to use a MPx downpipe with or without cat for this exhaust to mount onto your Neon SRT4.
  • me
    Can i use the stock cat
    1 Answer
    • Modern Performance

      No. This exhaust is designed to be installed/used with the MPx downpipes.
  • Jeff
    Can i install this exhaust having the stock turbo? Will i gain or lose power? I was told that if i installed this exhaust i would just lose power with the stock turbo. but i thought if i installed this i would gain power.
    1 Answer
    • Modern Performance

      Turbocharged engines work best with the least amount of back pressure. With this exhaust installed you'll be fine even with a stock turbo, dont worry.
  • wayne
    Will the no cat version trip the check engine light?
    1 Answer
    • customer service rep

      If you have a stock pcm, then yes you'll get a check engine light for no cat. If you have ANY aftermarket pcm flash, or replacement pcm you wont have a check engine light.
  • Anonymous
    Do you think this exhaust will rub or hit (over bumps or uneven ground) with BC coilovers?
    1 Answer
    • customer service rep

      There is really no way to answer this as we have no idea how much you are going to lower your car. If you lower your car 1.5-2 inches, you're probably going to be fine. If you lower your car 2.75 inches, you're definitely going to have problems.
  • Anonymous
    is it a 3' downpipe?
    1 Answer
    • customer service rep

      Yes. 3 inch from the o2 housing to the exhaust.
  • Zaheer
    I have a aftermarket straight pipe exhaust front to back will this work? Or will I have to modify anything?
    1 Answer
    • customer service rep

      This package, the side exit exhaust with downpipe, replaces the entire SRT-4 exhaust from the o2 housing on the turbo on back. So, whatever you have now, this would replace it.
  • Moe
    Does it sound louder with catless? Or with cat? Also have stock turbo does it bolt right on?
    1 Answer
    • customer service rep

      Yes, the catalytic convertor is like a muffler for sound, and without a cat, its going to be louder. Yes, this exhaust will work great with the stock turbo.
  • Bryan Duta
    I have a diablosport intune. Will this throw a check engine light without the cat in it?
    1 Answer
    • Customer Service Rep

      If you have ANY tune installed (Mopar stage 1, 2, 3, Diablosport tune, etc, you will not have a check engine light without cat.
  • Conner
    If I got it without a cat on would I need a long tube header? And does this fit a 2.0L neon 2005 with a long tube header on it?
    1 Answer
    • Customer Service Rep

      This exhaust should not be used on a non turbo car, it will be obnoxiously loud. No it will not fit with a non turbo long tube header.