Challenger SRT8 Engine & Performance Modifications

Discuss the 425HP/420lb-ft 6.1L HEMI V8(2008-2010) and 470HP/470lb-ft 6.4L HEMI V8(2011-) engines and performance mods.

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  1. BIRDMAN

    6.4L V8 Challenger SRT8 Thread Prefix Example

    BIRDMAN, Sep 19, 2011
    Replies:
    3
    Views:
    5,105
    Shaggy
    Nov 30, 2011
  1. Katshot

    Exhaust mods

    Katshot, Apr 17, 2020 ... 10 11 12
    Replies:
    114
    Views:
    14,819
    Katshot
    Nov 12, 2020
  2. SRT-Tom

    Racer X's Races his Demon 170

    SRT-Tom, Jan 8, 2025 ... 3 4 5
    Replies:
    47
    Views:
    1,572
    stingray
    Apr 26, 2025
  3. SRT-Tom

    6.1L George Barris Custom Challenger Up for Auction

    SRT-Tom, Jul 23, 2021 ... 2 3 4
    Replies:
    33
    Views:
    4,111
    2017 Redline HC
    Aug 7, 2021
  4. Jason Lessler

    Supercharging a scat pack

    Jason Lessler, Sep 5, 2019 ... 2 3
    Replies:
    27
    Views:
    9,482
    Jason Lessler
    Dec 21, 2019
  5. SRTSammy

    6.4L K&N Filters void the warranty??

    SRTSammy, Nov 30, 2011 ... 2 3
    Replies:
    21
    Views:
    12,502
    SRT-Tom
    Apr 29, 2014
  6. Tripmine56

    Catch Can?

    Tripmine56, Apr 10, 2019 ... 2
    Replies:
    19
    Views:
    4,988
    Nick@GotExhaust
    Aug 3, 2019
  7. 70-426_10-SRT

    Front Wheel Line Lock?

    70-426_10-SRT, Jul 2, 2018 ... 2
    Replies:
    17
    Views:
    3,026
    70-426_10-SRT
    May 10, 2020
  8. 70-426_10-SRT

    6.1L Took her to the Track last night

    70-426_10-SRT, Aug 25, 2019 ... 2
    Replies:
    16
    Views:
    2,748
    B5blueRT
    Sep 29, 2019
  9. motomutt

    6.4L 2022 Scat Pack Shaker front strut tower brace

    motomutt, Feb 4, 2023 ... 2
    Replies:
    15
    Views:
    3,184
    baccaruda
    Mar 25, 2023
  10. Mark McClouds

    2020 Scat Pack

    Mark McClouds, Oct 21, 2020 ... 2
    Replies:
    15
    Views:
    3,036
    Katshot
    Oct 23, 2020
  11. 70-426_10-SRT

    Well crap, Hurst Shifter broke

    70-426_10-SRT, Jun 25, 2020 ... 2
    Replies:
    14
    Views:
    1,977
    70-426_10-SRT
    Jul 8, 2020
  12. SRT-Tom

    2008-2009 Challenger SRT Sightings

    SRT-Tom, Mar 20, 2019 ... 2
    Replies:
    14
    Views:
    2,891
    HemiFeverAZ
    Jun 17, 2019
  13. Tom Joyce

    P0420 Catalyst efficiency Code

    Tom Joyce, Nov 24, 2021 ... 2
    Replies:
    13
    Views:
    1,980
    Tom Joyce
    Dec 5, 2021
  14. AnthonyLopez11B

    6.1L Alternator cooling

    AnthonyLopez11B, Feb 7, 2017 ... 2
    Replies:
    13
    Views:
    7,439
    HemiFeverAZ
    Jun 28, 2019
  15. 70-426_10-SRT

    6-speed question

    70-426_10-SRT, Dec 11, 2018 ... 2
    Replies:
    13
    Views:
    3,177
    70-426_10-SRT
    Dec 19, 2018
  16. SRT-Tom

    Six Things Not to Do with a 6.4 Engine

    SRT-Tom, May 8, 2021 ... 2
    Replies:
    12
    Views:
    4,639
    Farmer Fran
    Feb 10, 2022
  17. HemiFeverAZ

    6.1L radiators

    HemiFeverAZ, Jun 17, 2019 ... 2
    Replies:
    12
    Views:
    3,184
    HemiFeverAZ
    Jun 23, 2019
  18. SRT-Tom

    Plum Crazy Demon

    SRT-Tom, May 16, 2018 ... 2
    Replies:
    12
    Views:
    4,053
    ransomlowery
    Aug 23, 2018
  19. ransomlowery

    6.4L MSD shift light install help needed

    ransomlowery, Aug 10, 2018 ... 2
    Replies:
    12
    Views:
    3,172
    ransomlowery
    Aug 14, 2018
  20. SRT-Tom

    SRTs Being Auctioned at Mecum

    SRT-Tom, Jan 1, 2025 ... 2
    Replies:
    11
    Views:
    705
    bobbymac
    Apr 14, 2025
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