Quote:
Originally Posted by Vwbeamer
I don't want to go Julian Edger on you but.
I built,and raced aircooled VW engines from 1999 to 2009. I had access to a dyno, and different measuring equipment, etc. The four into one header is the best design. Gene Bergs extractor exhaust when properly sized will pull a VACCUUM at the exhaust port when matched with the correct stroke, bore, ETC. It will literially suck the exhaust from the cylinder. There is no need for anti reversion cones on a well designed header. This one subject I have extensive expertise in. I have built NA asperated VW engines that produce over 100 hp per litre. you can google my name "James Beahm" and "hot VWs".
Trust me when I say a long tube 4 into one header is best for low end torque. The problem is the packaging it all , plus the further you move the cat from the head, the lower exhaust temps, and the cat doesn't work as well.
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Lucky for me the lce long tube header is equal length, bolts up like stock header, and ceramic coated. So coated should help with the increased surface area of exhaust in the engine bay and exhaust temp a bit. Also lucky I don't live in cal since it's not 50 state approved. Also no complaining in the forums about cat codes or anything from what I can see too which is a huge plus.