Powers Pages - 2004 Honda Civic Si EP3

Installation of the new K&N intake was a simple process that required less than a handful of tools. It was no surprise that the K20A3 engine responded well to the upgraded intake system where we netted a total of 7 peak horsepower and more than 5 lb-ft of torque over our initial baseline run. While the filter helps to improve on horsepower gains, we liked the fact that the Typhoon intake system comes with an official CARB EO sticker to ward off any unsuspecting law enforcement when attempting to send your car to the local ref station.

Pay close attention when swapping over the intake air temp sensor. We've heard of owners cracking the sensor itself and sending the engine into check mode. If you're more concerned with the loud roar emitting from your engine bay due to the new intake, rather than the newfound horsepower, perhaps now is a good time to reconsider an aftermarket intake and go buy yourself a nice cozy electric vehicle and call it a day.

Intake, Filter, brackets, clamps, hose, nuts and bolts, instructions, CARB EO sticker

10- and 12mm socket, 10mm open end, ratchet, extension, screwdriver and pliers

45 minutes

Dyno charts reveal the intake created horsepower from 3500 rpm 'till redline with a consistent power increase of 3 to 5 hp throughout the powerband. Torque numbers came in at an impressive gain of 5 lb-ft from 4200 and remained consistent 'till redline.

K&N Typhoon Filtercharger
Peak HP 146.0 / Peak TQ 127.8

Horsepower Gain
1500 to 3500 HP range: 0 to 2
3500 to 5500 HP range: 3 to 7
5500 to redline HP range: 2 to 7

Torque Gain
1500 to 3500 TQ range: -1 to 2
3500 to 5500 TQ range: 2 to 5
5500 to redline TQ range: 4 to 5

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