I am in the process of accumulating parts to complete a 2.8L M20 build, turning my attention to the exhaust, I have read a number of threads, my specific questions are:
1. Which long tube header ? BTB UK exhaust is a great piece but they are not looking to manufacture any more, have watched german ebay for alpina/hartage and they rarely come up for sale, the Ireland header looks fine but they have a history of offering parts with issues, suggestions ?
2. I will be using a y pipe to merge the collectors, then installing a resonator and then finally a rear muffler. Is 2.5 inches preferred for the single pipe diameter ?
Looking for advice from folks that have done this and have dyno results to back up suggestions.
Thanks very much
1. Which long tube header ? BTB UK exhaust is a great piece but they are not looking to manufacture any more, have watched german ebay for alpina/hartage and they rarely come up for sale, the Ireland header looks fine but they have a history of offering parts with issues, suggestions ?
2. I will be using a y pipe to merge the collectors, then installing a resonator and then finally a rear muffler. Is 2.5 inches preferred for the single pipe diameter ?
Looking for advice from folks that have done this and have dyno results to back up suggestions.
Thanks very much
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