Pros
Comprised of a 2.5-inch mandrel-bent aluminum pipe, the AMS performance hot pipe is a simple-to-install piece that can reward your Evo with added horsepower. The factory Evo plumbing was designed by Mitsubishi as a cost effective way to interlink the inlet and outlet piping. Unfortunately, the soft rubber hose the factory provided is considered less than ideal for any performance vehicle. The soft rubber hose has a tendency to expand when under boost. This expansion causes an increase in air turbulence and deflection, which can cause a loss in both horsepower and torque. The AMS Evo X upper intercooler pipe was designed to flow more air than the stock unit using its 2- to 2.5-inch transition for maximum performance. Using the factory location core support strap, the AMS hot pipe can be installed by even the most amateur mechanic.
Cons
While installing the unit is a no-brainer, the larger-sized hot pipe diameter was a minor concern when attempting to reattach the factory radiator cover shroud. Although the hood clears without an issue, we suggest trimming the plastic to accommodate the new pipe.
Dyno Test Results
With the new hard pipe in place, the rollers were spun once again. We found an increase from 4,400 rpm to redline with the largest gains occurring at 4,730 rpm with an increase of 12 hp and 10 lb-ft of torque. As the boost level increased, the gains were obvious as a 5 to 9 hp and 4 to 8 lb-ft of torque margin was seen from 5,600 rpm to redline.
Final Dyno Results +45HP and...
Final Dyno Results
+45HP and 17LB-FT of Torque
Conclusion
What began as a baseline dyno run of 237 hp and 247 lb-ft of torque was quickly revamped with our final run of 282 whp and 262 lb-ft of torque. A gain of 45 hp and 17 lb-ft of torque was established with some of the basic bolt-ons more commonly used on the street. Upon dyno testing the Evo X and the new 4B11, we barely touched the surface on the true potential of this motor. Stay tuned in the near future as we plan to take this engine to the next level.
| RESULTS |
| Baseline | 5Zigen ZZ
Exhaust | AMS
Performance
Intake | ARK Design
Advanced Boost
Controller | AMS
Performance
Hot Pipe |
Peak
Horsepower | 237 @ 5,570 rpm | 241 @ 6,390 rpm | 252 @ 6,250 rpm | 276 @ 6,894 rpm | 282 @ 6,905 rpm |
| Peak Torque | 247 @ 4,330 rpm | 251 @ 4,443 rpm | 263 @ 4,210 rpm | 262 @ 4,110 rpm | 264 @ 4,115 rpm |
Average
Horsepower | 178 | 183 | 191 | 194 | 194 |
| Average Torque | 199 | 203 | 213 | 217 | 217 |
Final Power
Gains | Baseline | +4 hp
+4 lb-ft of torque | +11 hp
+12 lb-ft of
torque | +24 hp
-1 lb-ft of torque | +6 hp
+2 lb-ft of torque |
Total Gains
+45 HP
+17 LB-FT Of Torque
Parts MSRP
5 Zigen Border
ZZ Cat-Back
Exhaust
$1,130
AMS Upper
Intercooler
Pipe/Hot Pipe
$295
ARK Design
Advanced Boost
Controller
$390
Dynamic Autosports
www.dynamicautosports.com
5Zigen USA
www.5zigenusa.com
AMS Performance
www.amsperformance.com
ARK Design
www.arkdesign.co.jp