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Discussion Starter #1
Just wondering if anyone knows what OD pipe would mate to the stock exhaust. I am wanting to do a custom exhaust mod (with baffles) but don't have a caliper to measure the pipe I would need.

Thanks in advance to any gear head out there that can help...
 

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Just wondering if anyone knows what OD pipe would mate to the stock exhaust. I am wanting to do a custom exhaust mod (with baffles) but don't have a caliper to measure the pipe I would need.

Thanks in advance to any gear head out there that can help...
Honda did something alittle strange in the stock exhaust design. The front head pipe is 1 7/8 and the rear head pipe is 1 3/8 diameter. This basicly the pipe from the exhaust ports. They also have a welded ring about 2 to 3 inches in at the rear of each pipe that makes it differant from the pipe diameter. The best thing to do is to take it apart and see for yourself.

The small diameter rear head pipe was done so they could equalize the back-pressure on the exhaust system.

I am not sure I helped you.
 

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Invest in a set of digital calipers. I got a 6" set at Home Depot for $19.99 and it reads in decimals, mm's and fractions believe it or not. They are a very handy tool to have around the house, especially for situations like this.
 

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Honda did something alittle strange in the stock exhaust design. The front head pipe is 1 7/8 and the rear head pipe is 1 3/8 diameter. This basicly the pipe from the exhaust ports. They also have a welded ring about 2 to 3 inches in at the rear of each pipe that makes it differant from the pipe diameter. The best thing to do is to take it apart and see for yourself.

The small diameter rear head pipe was done so they could equalize the back-pressure on the exhaust system.

I am not sure I helped you.
So, what you're saying it that a set of slip on pipes have different diameter outputs? Like when I did my "custom" straight pipes :D

I guess that wasn't very smart, huh :confused:
 

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Discussion Starter #6
Honda did something alittle strange in the stock exhaust design. The front head pipe is 1 7/8 and the rear head pipe is 1 3/8 diameter. This basicly the pipe from the exhaust ports. They also have a welded ring about 2 to 3 inches in at the rear of each pipe that makes it differant from the pipe diameter. The best thing to do is to take it apart and see for yourself.

The small diameter rear head pipe was done so they could equalize the back-pressure on the exhaust system.

I am not sure I helped you.

Thanks...you did help. I took the heavy stock unit off yesterday and noticed the different pipe diameters too. Well wish I could talk more, but heading out the door to Daytona right now..

Later
 
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