Dual exhaust tips look and sound nice, but won't give any significant torque gains.
Beware of marketing gimmicks. Spend wisely.
You could look into turbocharging, Diablo tuning or NOx. You want the car to still pass emissions and be insured on public roads. Maybe kept as a daily driver?
Tuning-wise, the Chrysler engineers did a great job of finding the optimum combination of torque, fuel economy, emissions, driveability and serviceability. MultiAir gave a significant boost in performance.
Keep up with scheduled maintenance , use a synthetic 0W-20 motor oil that meets Chrysler MS-6395. Use the specified OEM spark plugs for best burn.
If you haven't already, get the oil consumption recall done. The new software should contain all the improvements of past versions.
THIS BULLETIN SUPERSEDES SERVICE BULLETIN 18-051-16 REV. B, DATED SEPTEMBER 14, 2016, WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED
chrysler.oemdtc.com
The Tiger Shark and Hurricane 2.4L were nice developments, but I don't know of a source for installation kits outside of a transplant from a donor car. You would probably need the PCM and wiring harness (at least) out of the donor.
The Chrysler Tiger Shark and World Gas Engines: 1.8, 2.0, 2.4 TigerShark For 2015, cars with the 2.4 liter engine got a Partial Zero Emissions Vehicle package in the 14 states following California standards. The turbocharged Hurricane engines have their own page. The "World Gas Engine"...
www.allpar.com
The new “Hurricane” four-cylinder is named after another fighter plane — but the same name was used for a long-gone Jeep engine. Sources have told Allpar that the goal is for one Hurricane to reach 260 horsepower or so, and for another to meet or beat 300 — so it can do a credible job of...
www.dodge-dart.org
Hi all, old guy mid 50-s here have several older mopars in Hemi Orange got a newer Hemi Orange Hellcat Charger and have wanted a Dart for several years now to replace an ageing neon bought new that is still doing ok at 150k miles. I wish I had gotten serious about a Dart a few years ago when...
www.dodge-dart.org
Keep your eyes open for a 200 with the 3.6L V6. ☺