These headers sound great, easy to install if you want to remove the CEL use the proper oxygen sensor spacers the one near the bottom should be 90° spacer but I would do research or ask a mechanic for advice before installing the spacers into these headers because I ran into issues which took $360 out of my pocket. These headers are great but be careful on how you install oxygen sensor spacers.
Easy to install, fit nicely, and improved the sound as well as the performance. It didn't make it a race car but it's noticable. Check engine light did come on after a while for the cat efficiency, gotta trick the O2 sensor if you don't want the light. Strong fuel smell without the cat, I love it but would never pass an emissions test. I live in a state that doesn't require them.
Got here on time in great condition, decent quality and they fit my 2001 2dr honda civic ex no problem( even though amazon said they would NOT fit ) I feel a good difference in its pull from a dig or from a 60 mph roll. I recommend to anybody building on a budget.
Great flow . Strong pulls
Was a direct bolt on. Easy enough install, might be challenging if your bolts are seized. Made my car with a custom exhaust sound much louder and deeper.
Feature Product
- Made of high quality steel covered with metallic ceramic coating.with 4-1 direct bolt-on design
- TIG welded CNC machine flange
- O2 sensor and EGR bung insertion / Metal gasket included / Inlet: 1.5" / Outlet: 2"
- Increase high flow air, instantly gain 10 to 15 Hp. / Tq
- Application: Please check part finder on top of the page (Professional Installer is Highly Recommended) (No Instruction Included)
Description
The exhaust manifold found on the 2001-2005 Honda Civic D17 SOHC Non-VTEC 4 Cylinder Engine were designed to combine the exhaust gasses from each of the cylinders quickly with a manifold that was cost effective to produce. Our 4-1 off-road racing headers are designed to allow the exhaust gasses to flow more freely from each cylinder and combine in a more efficient manner. Tubing has been optimized for the 1.7L engine. This creates a reduction in cylinder backpressure and improved exhaust gas velocity. These improvements free up lost horsepower and torque. An added benefit is a more performance oriented exhaust sound.
Package Included:
Compatible with:
VERY WELL MADE. GREAT PRICE. NO PROBLEMS.
Same as described
Works well however there was a pinhole leak where the four pipes come together. Also it was a bit of a stretch connecting the oem 02 sensor
Perfect fit
Great fit, sounds/performs sweetly. I like tacos.
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