True, but Qld can get colder than Vic at times, too ... the point is that Qld is consistently a warmer climate than Melb. You make an excellent point about your CES system ... you've noticed an improvement by having it. Whether that's good value to you or not depends on yourself, but I think too many people put too much credence on a certain kW increase with mods. I wouldn't have a clue how many kW my panel filter and sports exhaust have added, but its definitely improved the drivability and sound of the car ... so I'm rapt. Someone else might have dynoed it before and after and seen 1kW on the screen, and to them it might be a waste of time as a result. Here's an interesting question ... has anyone compared a 100kW Rolla with the 93kW version? 7kW diff at the flywheel should mean, say, 4-5kW diff at the wheels (uneducated guesstimate) ... I wonder how many people can pick the difference by seat-of-the-pants :) Good question Buddha ! Me and Corzza (Pete) done some independant testing after a meet a while back. ME : 2002 levin. 100KW - Mods : Sportivo Exhasust - Rims - King Springs 60.000ks PETE : 2005 Levin 93KW - Mods : TRD CAI - 2 1/4 catback with Xforce Muffler - King Springs - Rims 18,000 After a few indenpendant tests (hahahahah) we found our cars to be very close. He got one up on me due to a bad shift on my part, then we were mostly side by side. One thing i did notice was he was shifting 1st - 2nd quicker then me as i was at 5000 when he sifted each time. he said he was at limiter. Im guessing thats the CAI making the car Rev quicker.