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SRT-4 AGP Stage 4 Package

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Product Description

Introducing the AGP Dual Ball Bearing Stage 4 Package; from this point forward, let it be known as Stage 4. We know what you're thinking, "Not another confusing turbo kit offering from the turbo guys at AGP!" The reason why we've decided to create this package is for the sole purpose of simplifying the upgrade path for your SRT-4.

So you've just purchased an SRT-4, you love everything about it: the seats, the looks, the handling, and the power. However, you're a gear head and can't leave a car stock, and what better than to increase the performance of the car with, hrm let's say about 200 more horsepower. Up until now, you've had to piece all the parts together to make it all work properly to get over 400whp on pump gas, and it's been confusing as hell for most of you. Now it's simple.

The heart of the Stage 4 is centered around the AGP DBB Big Turbo Upgrade Kit. This kit starts off with a new exhaust manifold centered around the T31 High Flow 4 bolt outlet turbine housing. Turbo placement is a key variable in this design, because of the clearance with the engine and firewall. Rest assured, the centerline placement of the turbocharger allows for enough room so you DO NOT have to "convince" your firewall. NO DENTING OR HACKING OF THE FIREWALL NEEDED with our kit.

The next step is integrating the highest quality and perfectly matched dual ball bearing turbo assembly into the mix. As our base turbo, we've chosen the Delta 38 DBB. We add an elbow to the compressor housing so that it will line up to your factory charge pipe with only a little modification. The AGP-38 external wastegate has been the choice among racers in all industries. We needed a way 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 push the engine to its limits.

In order to physically make the turbo kit work properly, the Stage 4 includes our Upper and Lower Hard Pipes with an HKS SSQ Blow Off Valve and the AGP Cold Air Intake. Since the stock turbo houses the system's Blow Off Valve, we needed to add one into the mix with the kit. The AGP CAI is available in a variety of colors to match your particular taste, but please note that colors are special order, while we always have polished in stock.

Your bigger turbo needs more fuel so the Stage 4 includes the Walbro 255lph high pressure fuel pump that feeds the 888cc or 1200cc saturated injectors (high impedence). We've found a way to manage all that extra fuel for you with the AGP Specific Diablosport Intune flash. No wiring, no tuning, just plug it in and flash your factory PCM to pretuned Stage 4 specifications. If you wish to run more than 440whp, we recommend adding our Fuel Return Kit to your Stage 4 package.

Next on the list in the Stage 4 is the Turbo XS High Performance Boost Controller to fine tune your boost curve.

A key ingredient in achieving the 400whp on pump gas number with Stage 4 is upgrading the the factory intercooler with one of AGP finest products, the Direct Fit FMIC. You do not have to remove your factory "crash bar" with this intercooler. Do not let its size fool you, this bar and plate core packs a huge punch in allowing consistent air flow at 30-50 degrees cooler over the factory unit. You have the option to choose our Race FMIC at an additional cost.

You'll need to be able to get all this new power to the ground safely. The factory engine mounts for the SRT-4 are inadequate for even a stock car. The AGP Solid Mount kit with Tranny Mount will eliminate your wheel hop and allow your new found power to plant to the the pavement. This mount kit is absolutely necessary for a modified SRT-4, and can improve drivability and will definitely cut down your quarter mile times. The kit includes a solid upper mount, solid lower mount, and washers for the top and bottom mounts. Available in black and silver powdercoated finish. We also include a new aluminum solid Tranny Mount with Stage 4.

To sum it up for the crackhead price of $4500, you get the following:

Stage 4 Dual Ball Bearing Turbo Kit of your choice

Upper and Lower Hard Pipes with HKS SSQ BOV

AGP 3" Cold Air Intake (choice of color) 

AGP Diablosport Intune Fuel Kit (Intune, 888cc injectors, Walbro 255 fuel pump, 3Bar MAP & TIP Sensors, Custom Tune)

Turbo XS High Performance Boost Controller

AGP Direct Fit FMIC (or optional Race FMIC)

AGP Solid Engine Mounts (choice of color) and Tranny Mount

In order to fully utilize the Stage 4 kit, we recommend a 3" exhaust and an ACT Xtreme clutch.

Available with the AGP logo stencil that will allow you to paint our logo on the intercooler any color you like.  We recommend using brake caliper paint, it seems to hold up the longest. 

Please allow 1-3 weeks for delivery on orders with special finish options.

No Substitutions, no deletions please.  We have given you a highly discounted item here.  Please do not ask us to change it up.

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Product Reviews

  1. Classic 3147 5 Star Review

    Posted by on 30th Sep 2012

    If it ain't broke?.......I bought this kit almost 3 years ago with the older 3147. The Neon is at 147,XXX miles with the kit at about 85k and still going strong now I got another SRT and its time for the "same" kit (delta 42) with better technology AND better reliability?
    Perfect fitment, perfect parts for install..
    AGP is simply 2nd to none..

  2. GT3076R S4 SRT-4 5 Star Review

    Posted by on 15th Apr 2012

    Bought this kit over 4 years ago. Loved it then and love it even more now. It is a well thought out and well designed kit. I recommend it for anyone looking to take the SRT-4 to its full potential.

  3. 50TRIM 5 Star Review

    Posted by on 12th Apr 2012

    I bought the Stage 4 kit about 3 years ago. I had the first turbo on for about 6 months before it had some serious shaft play and had to be replaced. AGP customer service is Amazing and they took care of the turbo for me. I have never seen a company so customer oriented. My kit is still running good. I have had no issues what so ever. If you want a relaible kit that you can bolt on and go this is the one you want. I wouldnt go with any other company!!!!!

  4. srt4-50 trim rocket 5 Star Review

    Posted by on 8th Aug 2011

    my srt is a rocket and i have the agp stage 4 kit 404 whp and im door 2 door with the 130 thousand dollar 911 turbo and started to pull away love to tick those expensive car owners off love agp reppin yall in los angeles ca,also have a evo x wating 4 agp turbo kit agp till i die!

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