PowerPages: 1991 Toyota MR2 Turbo

Dyno 3: A'PEXi Power Intake

Pros
The A'PEXi engineers crafted a functional and clean-looking heat shield, and perfectly shaped brackets. The intake adapter mounts up neatly to the stock MAF with four nuts. Fitment is excellent. Removing the stock airbox makes the side vent very functional and brings cool air straight to the filter. The turbo is more efficient if it breathes without restriction. This intake proves it: We made 7 hp and 5.8 lb-ft of torque--and we didn't even change the intake hose.

Cons
This intake utilizes A'PEXi's proprietary air filter, which is not reusable. Some people may want a cleanable filter, and this isn't. The A'PEXi adapter attaches to the filter with four bolts, so it cannot be adapted for use with any other filter system.

Notes
All instructions are in Japanese, but the illustrations will get you to where you want to go. The intake fits like a charm and gives you a healthy dose of horsepower throughout the power band, especially on the mid to high end.

Parts
Filter, intake adapter, gasket, heat shield, brackets, instructions and hardware

Tools
10- and 12mm sockets, extension, ratchet, 10- and 12mm wrenches, Phillips screwdriver

Installation time
40 min

Temperature
Air temperature @ 73.5 degrees Fahrenheit
Temperature difference from previous run: +0.7 degree Fahrenheit

2000 to 3500 HP range: 0 to 4
3500 to 5500 HP range: 1 to 10
5500 to redline HP range: 0 to 10

2000 to 3500 TQ range: 0 to 5
3500 to 5500 TQ range: 2 to 10
5500 to redline TQ range: 0 to 9

Peak HP: 159.4
Peak TQ: 167.5

By Richard Fong

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