The SS headers are a waste of money. If you hadn't noticed, the BMW 318 motor already comes with a set of very nice flowing stainless steel exhaust manifolds. The 6 cyl models benefit more from an upgraded header as they use some nasty looking ceramic crap from the factory. It's funny how on the cheaper 318 motor, BMW decided to use better internals; forged crank, forged pistons, ss exhaust manifolds, cast aluminum intake manifold, aluminum valve cover. It's supposidely based on the BMW 850V12 motor's technology, BMW's most unreliable motor, yay!
Without any further modifications or proper tuning, you'll just feel a huge drop in low-mid ranged power. You'll gain some high end, but in the end your car will be slower. You need more internal engine modifications inorder to take advantage of the better flowing exhaust system. Oh and BTW, using an upgraded header with a stock cat is even more a waste. The whole point of a header is for better flow, the cat restricts the flow so the money spent on your header should have been better spent somewhere else. SS exhaust for the 318 is a nice choice though. No worries, if you plan on some internal modifications in the future, you made a good choice. Those are some quality headers, about 100,000 times better than Genie. Just find yourself a high flowing cat or hollow out the one you have.
Did you get the 4-2-1 or 4-1? Anyways, I hope you like revving
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Originally posted by buuhh99@Dec 21 2004, 12:41 PM dude do a swap first it will cost u like 3 grand for the engine rebuild if u can get a core then install it and your car will be a lot faster
we have discussed this topic many times b4... the supercharger 318 is a very good performer... it is faster than a stock 6 cylinder... and furthermore.. the engine mounts for the 4 and 6 cylinders are different.. so your 3 grand figure is not correct... and for wat.. to increase the weight of my car???
think about it.. similar power... less weight..= good choice...
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Originally posted by 97alpineM3@Dec 21 2004, 11:35 AM If you get a high flow one.. you can always just put your old one back in... go to the inspection.. then put the high flow back on... I know a lot of mustang guys who do that all the time...
make sure you put the stock exhuato n a few months before your test though!
To pass inspection buy a box of fresh donuts and a hundred in the passenger seat and then drop it off for inspection my friends supercharged v-8 convert excuse me v6 according to the gov't passes every year.
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