mine looked like a 2 inch (so i used 2 inch pipe). (then again i have 500cc less displacement.) go for it you will love yours too il have to post some videos and pictures of the setup. it really sounds nice. i was surprised how that little 14 inch muff on my truck sounded almost as quiet as factory from the inside. although as i said with the small muff that i used. it really howls on the throttle and combined with the added throttle response, power and fuel efficiency, was totally worth it. (you can hear it echoing in underground parkades)
I was looking at my exhaust last night, and noticed it tapers down after the cat pipe. I assume the cat pipe is 2 1/4 or 2 1/2, so will just make it all that size. The stock muffler is HUGE! I may have to go with an 18" Magnaflow if it is 2 1/4, that is the only length in that diameter that is center/offset. 2 1/2" had more options. The reviews I read on them, people love them.
another thing if you are doing 2 1/4 inch make sure your WHOLE EXHAUST is that big. if your cat flange is 2 inch then do the whole thing 2 inch (anything is better than the shower curtain rod exhaust ( mine was 1 5/8 at the tip) these trucks came with) +1 on getting done at a shop
Thanks for the info. I still have the stock 1.8 system on there, including exhaust manifold. I was thinking of doing a 2 1/4" full exhaust on it anyway. I may get one of these muffs and take it to my exhaust guy to build me a new system. I appreciate the time and information.
As far as loudness goes inside the cabin it's not much louder than stock. Crack the windows at low rpms (normal day to day stuff) I'd say it stands out a bit but not loud. Although when I'm really hard on the throttle I can hear it loud and clear and even echoing off cars and houses close by LOL (that happens from 4500-6000 rpm). But it's not that bad and it doesn't sound like a "ricer" no rasp or farting, just a nice growl from 2k-6k at wot. I tested this by driving with the windows down. If you don't want it too loud go for the biggest muffler you can stuff down there (with 2 inch inlet and outlet). The flow master 60 series should work well too (designed for small motors). Borla mufflers are a good choice as well. As I said back there my 1.8 really has a nice sound to it, unlike most 4 bangers I've heard. Your 2.3 is based on the same design so I think it will have a similar note.
Hey Kodiak sorry for the long wait for the reply. The exhaust on my sport kick was a custom job with my dad. I just used a universal magnaflow muffler. The 2 inch pipe was some old exhaust off an old Camaro. (Heavily modified). The end result was a system that sounds great. Improved throttle response and better power and fuel efficiency (it also didn't hang down as low). I can post a thread about it if you want more info
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