Upgrade Plan, 03-05 Neon SRT-4

Thats why, we have compiled a recommended list of parts for your SRT-4.

Because we owned the first 03 SRT-4 in Texas, and have performed over 250 dyno tests on 03-05 SRT-4's testing out parts, we know which parts will work best for you.

We have come up with 3 general plans for making more power. Each plan is tailored for people with different needs, noise/sound tolerances, and maintenance. You can follow these plans, or modify them to your liking. We have created this plan to give you a better understanding of what power levels can be expected.

Keep in mind when your reading this, that all of the horsepower numbers we are quoting are power at the wheels. NOT engine hp, but power at the wheels. The factory SRT-4 is rated at 215 hp for 2003's, and 230 hp for 2004-2005's. HOWEVER, Its well known that Mopar underrated the SRT-4 because the factory SRT-4's would dyno at 225-235 hp at the wheels bone stock. With most cars having a loss of 13-15% of power between the engine and the wheels its impossible for a car to have more power at the wheels than it has at the engine!

First up is the bolt on plan. This place utilizes the factory turbo, and is rated for 250-295 hp at the wheels. Pros- You can buy piece by piece as your budget allows Cons- Youve got to be careful to monitor boost levels

Second is the exclusvely Mopar plan. This plan utilizes the factory turbo, and is rated for 250- Pros- Care free, very well thought out performance increases. Smooth power build up. Cons- Higher costs than bolt on plan, cannot make as much peak power as bolt on plan.

Third is larger turbo plan Pros- Its time to make some serious power. Cons- Higher costs, time for a new clutch, and its very hard to keep your foot out of the throttle!

BOLT ON PLAN

First we recommend you start with a intake system. Most intakes we offer will give another 7-10 hp or so. Second we recommend an exhaust. Once you remove the intake and exhaust restriction it will allow the turbo to spool up faster. We highly recommend you use a 3 inch full downpipe and exhaust. Now its time to increase the boost. You cant just put a boost controller onto your factory SRT-4 and expect boost to increase steadily, because the factory wastegate is weak, and wont hold boost.

So, you need to first replace your factory wastegate actuator with a stronger actuator like the AGP or Kinetic wastegatge actuator. After you replace the wastegate actuator with a AGP or Kinetic, you can increase the boost that way, and if youd like to increase the boost further, you can use a boost controller.

If you want to increase the boost past 16 psi, youll get a check engine code if you dont have a stage 1. Therefore, to richen the fuel mixture, and eliminate any possible check engine codes, we highly recommend you get a stage 1 pcm from Mopar. To further increase your power, we highly recommend a larger intercooler to cool down the heated, compressed air from the turbo.

HP levels Stock 225-235 hp

intake, exhaust 250 hp intake, exhaust, stage 1 260 hp intake, exhaust, stage 1, boost controller 270-280 hp intake, exhaust, stage 1, boost controller, intercooler 290-295 hp

We highly recommend you install new motor mounts like the AGP motor mounts, and we also recommend colder range NGK spark plugs for any SRT-4 thats driven hard!

MOPAR PLAN

For those of you who are concerned about reliability, who dont want to do much hands on tuning/work or are concerned about noise, we have the following recommendations.

HP levels Stock 225-235 hp

Mopar stage 2 260-270 hp Mopar stage 2 with toys (with race fuel, on high octane mode) 275-280 hp.

Want to make even more power, but are concerned about noise levels, or water ingestion from a cold air intake? The Injen intake is a short ram intake that will provide good power, and is short enough to not have problems with ingesting water. The Mopar exhaust increases the noise level by about 10-12% and provides a nice power increase.

You can make even more power by using a new wastegate actuator, along with a intercooler, both are optional. We highly recommend you install new motor mounts like the AGP motor mounts, and we also recommend colder range NGK spark plugs for any SRT-4 thats driven hard!

BIG TURBO PLAN

For those of you who need more than 300 wheel horsepower, this is your only choice. The factory turbo just cant flow anymore air, and runs out of efficiency past 19 psi, or around 300 hp at the wheels.

At this point, you have two options. 1) Use a Mopar stage 3 turbo 2) Use a larger turbo, and manifold like the Hahn Racecraft kits.

With option 1, the Mopar stage 3 turbo kits, there is a Mopar stage 3 kit without toys, and Mopar stage 3 kit WITH toys. The base kit makes 315-330 hp at the wheels, and the kit with toys, with race gas and high octane mode can make 360-375 hp at the wheels.

With option 2, the Hahn Racecraft 16G kit can make 320+ hp. The 20G can make 360-380 hp or more. If you choose the Hahn Racecraft turbo kit without the port fueler, youll need to create your own fuel system, wether it be the AGP return line kit with RC injectors, or the Apexi SAFC with RC fuel injectors. Or, you could use the AEM EMS for complete tuning of timing, and fuel needs.

Of course, with either option, if you have other modifications like intake, 3 inch exhaust, intercooler, you can make even more power. Or, if you want to make even more power, you can add cams, and port the head for additional air flow. Tuning for fuel will make the difference here!

Keep in mind, that once you make over 300 hp, your factory clutch will not hold up, and you should replace your clutch to hold all the power your car will now be making.

Better motor mounts, like the AGP motor mounts, and NGK iridium plugs at this stage, are not an option, they are a MUST.