The next step is integrating the one "old school" turbo into the mix with an oil and water cooled center housing. The AGP-38mm external wastegate has been chosen to properly manage the exhaust flow to the turbine as to prevent any unwanted boost creep, but still allow enough control for those wanting to put the engine to its limits. The AGP-38 gate does this perfectly with a few different spring rates (all spring rates included in the kit). We vent the external wastegate to the atmosphere to keep turbine efficiency the highest as possible. We don't want wasted gasses and turbine gasses to fight each other downstream and create unwanted backpressure. For an additional cost, we now offer a wastegate reroute kit.

Now that you know what goes into the AGP T3/T4 kit, here is a little help on selecting the turbo that is right for your particular setup. Since we originally released this kit in 2003, technology has advanced so much that we have only kept around one turbo that's worth installing on your car. There is no perfect turbo for your car. You cannot just look at a map and engine and say "this is the perfect turbo" and expect it to work for everyone. If you want to autocross, your turbo will be different from someone who is roadracing, who is drag racing, who is street racing, who is just wanting a fun car. This is why there are so many turbos and selecting the right turbo is important. I'll try not to get too technical and just lay out the basics for your Neon SRT4. Bigger turbos flow more air, but due to the size, take longer to spool. By matching the correct wheels and housings, you can minimize lag, and still make good power. All numbers given are best case scenario and many things can affect power. The HP numbers are at the extreme limits of a turbo and not to be expected for everyone. Remember the parts are only as successful as the person or persons installing and tuning them.

50 trim: This is the best matched turbo for the 2.4L motor for maximum power with the stock rev limiter and the only "old technology" turbo worthy of being installed. This turbo is perfect for those wanting to make big power on pump gas and win just about any street race from a roll. Full boost should be right around 3100-3200rpm in a .48a/r turbine housing and 3500-3600rpm in a .63a/r. The difference being about 30-40whp less when peaked out on race gas for the .48a/r, but with the faster spool the .48 is nicer for pump gas street driving. Many cars over the years have pulled over 420whp on pump gas at 23psi. The maximum boost is around 30psi where we have seen 500+whp with the .63a/r. The ballbearing option is really nice on this turbo if you can afford it. The turbo comes with a 4" inlet ported shroud compressor cover with a 2" outlet.

Spool time: Spool can vary from car to car. There is no hard number to give. The condition of the motor, intake, exhaust, tuning and tons of other factors affect spool. In lower gears, the turbo spools slower. Spool numbers are normally quoted time to max boost in 4th gear. The turbo usually is pulling hard 500-600rpms before max boost as boost is coming on. Take this into account when looking at spool numbers. Our turbos spool fast because we know what we're doing and properly match them and use the right parts.

Reliability: A big question that we get alot is, "Can I have a reliable car with one of these turbo kits?" The answer is yes. As long as the car is safely tuned and has the proper supporting mods, then there is no reason that the car cannot be a perfect daily driver. Most owners report that gas mileage increases and the car has much better street manners than a bone stock SRT4. No more part throttle boost, boost spikes, crazy torque spikes, fluttering, surging or many other issues associated with the stock turbo. Power will come on nicely and pull hard all the way to redline. Boost is easy to control with any quality boost controller. The turbos will give years of life as long as they are fed quality oil and you prevent any foreign objects from entering them.

Modifications Needed to run an AGP 50 trim kit:

-3" intake with 4-3 coupler (all AGP turbos have 4" inlets)
-External Blow Off Valve Setup
-Fuel Upgrades
-3" exhaust

How to get big power? Want over 400whp? Then you need to properly setup the car and have the mods needed to do this. Any of the turbos we sell can easily reach this number. A quality high flow exhaust is a must. A 2.5" exhaust such as the mopar system can be restrictive at higher boost/power levels. Same thing with intakes. As you make more power, the more the intake and exhaust will affect the car. So making sure you have a good system on is important. A quality 3" intake with a good high flow filter is essential to making good power. The difference between one intake and another can be as much as 50hp, which has been dyno proven. The difference between one exhaust can easily be 20-30hp. That is why getting quality parts the 1st time is important. Another important piece is the intercooler. Intercoolers can make a huge difference. While the SRT4 comes with a FMIC factory, it is not a very good unit. On a stock car we've seen 10-18whp on the dyno. On a larger turbo, we've seen 40-50hp increases. We've had customers go from running 111mph traps to 118mph traps with just the change from an Ebay intercooler to one of ours.

Options: If you want some added flavor to your AGP kit, we can polish the compressor housing and/or heatshield. We also offer ceramic coating to the manifold, turbine housing, o2 housing, and dump tube in either black or silver. For those wanting to quiet down the wastegate dump, we offer a weld-on or bolt-on reroute kit.

Kit Includes: AGP T3 manifold, AGP-38mm wastegate, stainless steel dump tube, 50 trim turbo in a .48 or .63 A/R T31 turbine housing, 3" stainless steel O2 housing, oil feed and drain lines, water line kit, gaskets, nuts and bolts, stainless steel heatshield, overflow bottle.