2ZZ-GE rear muffler queries

[SA22C-RX]

I currently have a header back exhaust. It goes from 3 inch to 2 3/4s to a high flow cat "that I just put on this morning as the other cat **** itself" to 2.5" cat back then one hotdog and it looks like either 2.5 or 2.25 the rest of the way through to an 'X force twin loop' rear muffler...... I am wondering if anyone has any previous experience with 2ZZ-GE exhaust systems. I know N/A engines like some form of back pressure but I feel these 2zzge's would love a free flowing exhaust system. So my question is should I change the twin loop x force to a free flowing open rear muffler. The car would be a lot louder, that's fine, I'm a Rotor freak but would it also allow the engine to flow better??? Anyone have have any knowledge on these twin loops, are they restrictive? This is my first time dealing with one. The first time i looked at it, i was like wtf is that doing =], cheers to any advice.

[Squalled]

The idea of a twin loop, from what I understand, is to make the exhaust gases flow through the muffler twice to make the exhaust quieter without reducing flow.

Depending on brand some twin loops can flow fairly well. In my experience, I had one on my last car, 98 Honda Prelude VTi-R and it didn't really make it all too quiet compared to other ones. But it didn't feel to restricted either.

[SA22C-RX]

Thanks for the reply. Yeah it is fairly quite on idle and louder as revs rise. I'm certain with an "open rear muffler" this car would be fairly bloody loud. I took it to the creek last Wednesday and ran a 15.6 I'm sure I could a run a low 15. Maybe 15.1 or 15.2 with a better take off. I just wanted to know whether these twin loops are restrictive, I guess they're not really but power is power you know. Some will say the hi flow cat I put on recently is no better then the stock one that was on there but it runs a lot better with the hi flow. I guess I could take back to the strip, try run a low 15 or get some consistent times, then change muffler n see if there's any difference, I'd rather keep saving for another car though lol, cheers mate.

Edited June 25, 2016 by SA22C-RX
left a word out

[Squalled]

Also consider tyres, tyre pressure, suspension setup when drag racing. Changing some of those factors can lead to faster times as well.

I personally don't think twin loops are too restrictive on a standard internal engine.