What is the difference between kn 63 and 77

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It may not display this or other websites correctly. You should upgrade or use an alternative browser. Thread starter Benelli12 Start date Aug 3, Benelli12 Full Member. I'm wondering if anyone has either of these or have tried both, etc I'd like to get the best for my money and something that will go well with my new 40 series flowmaster.

Any takers on the subject? SM Full Member. I've never had either but seems like the purported HP numbers are better on the If they can be believed that is. I wonder whats the difference that makes such a drastic difference in HP gains. They both take the same replacement filter. I guess the aluminum tube allows more heat transfer than the plastic. Post Reply. I read the descriptions, but still don't really understand what the differences are.

I am looking for a bump in power on my Taco, which one would give me the most. IMO, the only difference is that the "aluminum" has better 'under the hood' looks and possibly, because it is machined, it MAY BE smoother than the Series But, that difference is im measurable. I got a great deal on my 63 Series for my '10 Taco.

Definitive , Mar 1, The 77 has an aluminum tube, the 63 has a plastic tube. The plastic tube will insulate the charge air better than the polished aluminum tube as it sits directly above the exhaust manifold and cat on the right side of the motor. But the best part is the way an un-baffled intake sounds! Especially over 3k! Wouldn't the plastic stay cooler? Show Ignored Content. Spicer X U-Joint Kit.