Swapping headers would be a pain. If you just need a couple of HP, convert to electric steering pump. Gets rid of the parasite drag on the motor and save 10 more lbs. UDP and electric steering might get you 8 HP. Cheap mod too (less than $400) if you make your own kit with a Vauxhall pump (same pump as a Cup car). It's made by TRW. Buy the pump on UK eBay. I got mine for $80 US shipped. I am collecting the rest of the pieces and planning to do the mod next month.
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