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Hi, are there any differences between the MAFs on non turbo and turbo skylines (RB25DE VS RB25DET)??? I suspect the MAF is knackered on my non turbo R33. Also what's difference between the green and pink labelled ones? I've tried searching but can't find much info and a straight answer. I recently brought the car and it has some major performance issues. I know non turbos are slow but mine is ridicilous. Honestly, it feels like it's got 80bhp max and that a 1liter Toyota Yaris would easily beat it lol. I've also been in a stock 2liter RB20e R33 with an exhaust and even that was twice as fast... It was parked up for a while so I serviced the car, changed oil, oil/fuel filter and sparkplugs. It gained alot of power but not as good as it should be. It had a broken cone filter fitted so I replaced it with a stock airbox+ filter but the car has lost power again but saw that the MAF was broken and the top has been taped up to hold it together. I pulled some of the tape off earlier so suspect that may be the cause and since then, it idles abit rough sometimes aswell but a little tap to bring to revs up sorts it out. Also the car has massive 3.5" straight though exhaust which I'm sure it's making me lose a huge amount of power. Am I right in believing that the ideal size should be 2.25 or 2.5" or wouldn't the exhaust make much difference?