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Message: <blockquote data-quote="ixeo" data-source="post: 1064000621" data-attributes="member: 14889">1. Custom make.. AH Heng at USJ 1 can definitely make one.. it'll be good but er.. affordable. I guess you're driving an Altezza you can afford his prices.2. Possible, depends the location of the pod I guess, if its in the engine bay sucking hot air you'll get loss of power, but in turn save petrol -- but of course if you feel lack power step on pedal more then you use more petrol. Hot air = less o2 sucked in to engine = less fuel injected.3. Depends which round type. I've seen catback exhaust systems make power throughout the entire power band example #2 and the same brand/company exhaust system make nothing in example #1example #1http://www.importtuner.com/powerpages/0802_impp_2004_honda_s2000/photo_04.htmlthat's the skunk2 catback on F20C.. an advanced NA engine much like the Yamaha endowed 3SGE in the Altezza. you can see not much is squeezed out from the exhaust upgrade..example #2http://www.importtuner.com/tech/powerpages/0702_impp_honda_fit_performance_modifications/photo_07.htmlskunk2 catback on the tiny 1.5L SOHC Honda Jazz engine.. you can see very significant improvement.opinions are like assholes, everybody has one - so I am not stating my opinion, just giving you numbers. you should look into dynos, power curves of 3SGE with exhaust systems. one JDM brand that comes to mind is Fujitsubo, as they publish numbers with each of their systems, here's one for the SXE10<a href="http://www.fujitsubo.co.jp/prods/detail/000000000000000927/00000000000000003185/00000268" target="_blank">FUJITSUBO ???????</a>without a power curve reading, hard to say, but if you asked me I would say its not significant as a standalone upgrade with those numbers, unless you're doing intake modification together, and throw in some tuning.</blockquote>