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  1. #1
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    Mar 2015
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    Anyone here who has swapped a 2015+ 300 diffuser to the SRT 300 one?

    I am trying to get some info regarding this modification. I came across some image of some owner that had the SRT diffuser and SRT tips swapped on, I know unlike the charger, the SRT and regular 300 now share the same bumper, it is just a different lower diffuser insert.

    I have not had any luck on finding other examples, I just wondered if the SRT tips and the cut outs line up properly with the stock or mopar 5.7 exhaust, which obviously will need welding and maybe some inlet widening to fit the SRT tips. I think those tip inlets are 2.5" so would need some mating to the stock exhaust muffler exits 2.25"? or so.

    Can always just get universal tips that are 2.25" with outlets around 4" and add them to the stock exhaust. But I think the SRT tips work nicely and fill the SRT cut outs better, SRT might be 4.5" outlets?



  2. #2
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    Mar 2016
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    Surprise, AZ
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    Interesting, I had no idea that they shared the exact same rear bumper. If that's the case, In theory your idea should work

  3. #3
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    Mar 2015
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    300rear.jpg


    Looks like you just swap everything, move the reflectors over to new piece, but the question is how are the stock 5.7L pipes lined up vs an SRT exhaust system, because they are behind bumper fixed tips, not attached to the pipe.

    Just hope more experiences can be found to get details, cause the only proof was some 1 poster who posted a photo of his rear simply just saying he swapped to the SRT diffuser and tips, but never went online again on another forum.
    Last edited by lxpursuit; 03-09-2018 at 03:19 PM.

  4. #4
    Join Date
    Aug 2017
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    Its better to buy an OEM 2015 SRT bumper and get it shipped from Australia AND just slam it on the car ..

    Just an idea

  5. #5
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    Mar 2015
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    Why would I order an entire bumper from Australia, since 15+ now share same bumper. All you need is the lower valance piece that can be ordered here for just $60. The concern about this was if exhaust line-up modification is needed for the muffler outlets.

    This mod only costs us around $60 and then $90 or so for each mopar SRT exhaust tip plus the mopar exhaust clamps around $19. Or just $60 for the valence and get some cheaper universal tips which can be welded on and fill out the SRT lower valence cut outs.

  6. #6
    Join Date
    Aug 2008
    Location
    Winnipeg, Manitoba, Canada
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    I was talking to some people at LXFest, and they said they were having issues ordering in the SRT valence.

    While your idea is 100% right. Getting the valence may be an issue.

    2013 300 SRT - 2017 Front and Rear SRT conversion.
    Fiberglass Hellcat Hood
    Accuair E-level / Universal Bags

  7. #7
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    Mar 2015
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    Quote Originally Posted by Ev0lv3 View Post
    I was talking to some people at LXFest, and they said they were having issues ordering in the SRT valence.

    While your idea is 100% right. Getting the valence may be an issue.
    To be safe, I had ordered one for $85 including shipping and got it in just 2 days from some Mopar warehouse in California before it might become an issue in the future, looks like the stock exhaust does not work well, need to use the 300 corsa or borla cat backs that comes with slightly longer straight cut tips so you can weld on a nice external tip. stock exhaust is slanted so much at bottom and cut almost to the edge of the suitcase, so would need a lot more modification or added custom piping, so a tip can be added to it and extended outside the valence, the stock exhaust is already a problem with those Charger RT owners trying to add tips with a police pursuit valence swap, but the borla/corsa users seem to have less issues welding on 7-8" rolled or double walled tips.
    Last edited by lxpursuit; 03-28-2018 at 03:15 AM.

  8. #8
    Join Date
    Mar 2018
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    Quote Originally Posted by lxpursuit View Post
    To be safe, I had ordered one for $85 including shipping and got it in just 2 days from some Mopar warehouse in California...
    I'd like to pick one up too, do you have a link or phone number and a part number? Thanks!
    2015 Redline 300S 5.7

  9. #9
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    Feb 2018
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    Tampa Florida
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    I have the SRT valance in my possession. Anyone know what is necessary to remove the rear bumper?

  10. #10
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    Mar 2015
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    Have to cut/drill out the plastic rivet on each sides, then use two new rivets, can re-use the rest of the plastic screws that keep the bumper together. the same screws and rivets that are shown in the bumper diagrams and rivets/screws similar to the police diffuser swap for chargers.

  11. #11
    Join Date
    Feb 2018
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    Tampa Florida
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    Thanks... are there fasteners in th trunk that I need to get to? The whole bumper has to come off because the reflectors are held on with 2 torx screws from the back side.
    Last edited by Lenny H; 06-05-2019 at 05:56 PM.
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  12. #12
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    Mar 2015
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    But from what I have seen, you can disconnect the lower valance while bumper is still attached. Thought the two reflectors are screwed to the lower valance? you mean they are also screwed into the bumper as well through the valance?

  13. #13
    Join Date
    Feb 2018
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    From what i can see the lower valance overlaps the bumper, The screws for the reflectors go through the bumper, than valance, and finally in the reflectors. I will be pulling the bumper tomorrow.

  14. #14
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    Mar 2015
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    Quote Originally Posted by Lenny H View Post
    From what i can see the lower valance overlaps the bumper, The screws for the reflectors go through the bumper, than valance, and finally in the reflectors. I will be pulling the bumper tomorrow.
    Take some photos, what exhaust you have? you need to add tips to it or the stock exhaust tucked behind could melt the new valance even on a short drive to the muffler shop.

  15. #15
    Join Date
    Feb 2018
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    Tampa Florida
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    Ok.......Bumper has to come off to do the valance. The good news is there are no rivets to drill out except the ones on the OE exhaust trim\tips, which will not need to be replaced since they are discarded. I will try to get pics tomorrow in the day light. Now how to post them will be another story.

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