PowerPages: 1990 Honda CRX Si

Dyno 4: DC Sports ceramic-coated header

Pros
These are one of the header designs that put DC Sports on the import performance map back in the day. Fitment is right on, as is performance: we extracted 5.6 hp and 3.3 lb-ft of torque--and the catalytic converter is still in place! Nicely finished and much lighter than stock, these headers do not disappoint.

Cons
Can't think of any.

Notes
Again, this ole dog fought us, and we were unable to separate the cast section of the stock header from the downpipe. Since the radiator support is very close to the block, you cannot slip the header out whole. We ended up having to cut the downpipe off. Obviously, do what you can to remove the stock parts without destroying them, but when push comes to shove, do what you've gotta do. Also, this header system actually moves the stock O2 sensor to a portion of the header that is closer to the catalytic converter. DC Sports includes an O2 sensor extension so you can route the wires from the front side of the block to the back, where the new sensor bung is located. Zip ties are included and makes the installation clean.

Tools
Ratchet, 12- and 14mm socket, 6-inch extension, 12mm wrench, WD-40

Parts
Two-piece header, rings, O2 sensor extension, zip ties and hardware

Installation time
20 minutes

Temperature
Air temp @ 71.3 degrees Fahrenheit
Temperature difference from previous run: -0.7 degree Fahrenheit

2000 to 3500 HP range: 0 to 3
3500 to 5500 HP range: 3 to 7
5500 to redline HP range: 2 to 7

2000 to 3500 TQ range: 0 to 5
3500 to 5500 TQ range: 0 to 5
5500 to redline TQ range: 1 to 5

Peak HP: 111.6
Peak TQ: 112.6

By Richard Fong

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