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Old December 27th, 2003, 11:34 PM   #1
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Exclamation Installed hi flow cat

I saw a high flow cat on ebay for our car for $50 so i decided to buy it and give it a try. It actually looks really nice, it is stainless and straight through. It even came with new bolts. So finally I decided to put it on today. After finally getting the rusted "old" one off i put it on. It weighs about 5-8 pounds less than stock and like I said earlier looks really nice (I'll post pics soon). My car is otherwise stock (except for removing the intake resonator) so I was unsure if I would feel any difference. Well it actually didn't make any noticable difference in performance or sound but I suspect with other breathing mods it might. On my old civic hb hybrid, replacing the cat with a straight pipe made a HUGE difference, but that car was also heavily modded. Just thought I would share a bit of info on my new mod.
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Old December 28th, 2003, 12:06 AM   #2
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so no sound at all?
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Old December 28th, 2003, 12:15 AM   #3
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You said yourself you dropped roughly 8 lbs. That in combination with an aftermarket exhaust will free up flow and drop roughly 10-15 pounds off the car. Less weight never hurt anyone.
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Old December 28th, 2003, 01:57 AM   #4
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You should get rid of the 2 resonators in the system after the cat. I had everything replaced with a straight pipe except for the 2 catalysts at the engine block. Once Comptech releases their J pipe, more hp should be released from the restrictive crimped pipes.
If you want sound, definately remove your resonators.
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Old December 28th, 2003, 02:43 AM   #5
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i removed the resonators and it sounds a little better but nothing huge.
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Old December 28th, 2003, 05:10 AM   #6
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i want to just wait for a group buy for the magnaflow exhaust instead of removing the resonator and premuffler. I was originally just gonna do that but i noticed my exhaust is kind of rusted and the pipe is small. Maybe it makes slight difference in sound having the hi flow but not too noticable.
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Old March 13th, 2004, 08:46 PM   #7
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Any word on pics and an update?
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Old March 13th, 2004, 10:09 PM   #8
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From what I read before, Accord CAT are NOT very restrictive like other models.. and hence.. does little after being replaced.. non-the-less.. the weight difference can play some role..

I doubt you need any CAT replacements from ebay.. just ask muffler shop to chop up the pipe and put it on.. might weight even less if use good materials..
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Old March 14th, 2004, 01:49 AM   #9
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How does this affect the ability to pass smog?
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Old March 14th, 2004, 02:08 AM   #10
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Accord is SULEV.. and there are still two CATs that we can't touch.. so removing one shouldn't be a prolbem..
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Old March 15th, 2004, 06:29 PM   #11
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Sounds good. I will hold off on anything and just do the Borla then. Better safe then sorry.
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