Great article, I completely agree with all of it!
I did not think of opening up the intake like that and spent considerable time on my version which will flow more air but at least I had the parts laying around, I love this free mod, do it
One note, during really cold weather you might get to much cold air, it was likely part of the spark blow out I had while making tuning runs, once up to 6K, no more spark, you might have to seal it up for higher RPM runs if around 30 degrees or colder.
Though expensive the Cobb is the best IC on the market in terms of size and direct airflow to the core, weight is great, the DHM for those a bit more hard core, big power, is the way to go.
Exhaust, most shops use crush bends causing great turbulence and restriction so a 3" exhaust is not really 3" when made that way. Even a cut and weld mandrel exhaust can be done poorly unless the flashing is removed and welds are not leaving a lot of slag inside the piping so make sure they do it right all the way to the tip.
Also be advised, many if not most single in and dual out mufflers are very restrictive so take a look into both ends with a bright light, pretty easy to tell if restrictive or not. I have seen one system with a horribly restrictive muffler, I have the same muffler out in my shop, it is SS and low priced as well as looks good on the outside, looking into it I was shocked at how bad it was made, again ruining much of the gain from a 3" system. Single in and out, perforated core is best as well as single out tip but a good split tip is not much of an issue, like the one pictured in the article. I have seen some single in and out mufflers and resonators that were not very good inside as well so watch for that.
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Great writeup, great real advice, real service from a great vendor, thanks!
Rick
