ok, i finally checked my rule book. "stock appearing" IS NOT in the wording. i think i may be remembering some talk about what woud be allowed at the WTC concerning trimmed skegs on lower units. so the os muffler swap is legal, sorry that my failing memory caused any confusion......there is no wording about internal mods, except the total displacement. so, depending on your budget, skill/knowledge, or engine builder's expertise - the sky is the limit with oem parts. i agree with mark, the max in-out rule is not creating parity. a dead stock/can't touch anything rule would just create a os class (which it is pretty much already), k&b's would be far behind. i mod my k&b engines as much as i can & still get RELIABLE performance. at local district races i do well, won the d-12 championship in sport 20 tunnel with my k&b. but, at a national event i usually end up in the latter part of the top 10(6,7,8). os is a modern design, while k&b has been stagnant for 20+ years. i'm not sure you will ever get parity with the engines offered. it's kinda like running a flathead ford against a late model hemi, guess who's winning? if you want to win, it's gonna cost money, just like any form of racing. until some other manufacturer steps up like os has, it will continue to be a one horse parade. basic tunnel cost is between $600-$900 (and up) from scratch, plus starting equip., fuel, memberships, etc. - not my idea of a beginner's class. you want a driver's & setup class? create a "spec" class. 1 hull, 1 engine, 1 prop - jmho. all this discussion is the same as ANY form of racing i've done over the last 50+ years. the more you try to make it simple, affordable & something close to stock BUT still allow ANY modifications, the more people will throw dollars at it to win. that's what i see being the big issues facing b sport tunnel racing growing. it IS serious racing, & prolly not for beginners. or at least not beginners expecting to do well right away.
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