I haven't herd anyone talkin about this , I got a cns carb and I loved the performince with it but after a few weeks it develouped cracks on the intake flandge I think they were caused by the casting flash not being cleaned at the factory I don't think I can fix it , this happened to a friend of mine also.anyway check it out I didn't and it cost me 50 bucks (call me we'll talk) later Bob