^^^ How does all that air in the 4" intake get past the 3" throttle body.

 

Not to mention he necked down to a 3" opening at the other end to the same Spectre filter, LOL...

 

Having thoughts on making a custom heat shield after doing some reading,the filter seems to be tucked in there pretty good but maybe it will suck heat off my coolant surge tank ect, hmmmp...

 

^^^ How does all that air in the 4" intake get past the 3" throttle body.


Not to mention he necked down to a 3" opening at the other end to the same Spectre filter, LOL...


Let me clarify...
Well...it is 25% bigger and IMO sounds & looks 25% better,
but probably costs 25% more.LOL
As far as performance...who's to say?
Can't be any worse. IAMOO


http://www.flickr.com/photos/75516134@N03/6787018954/

 

Now that I'll agree with. Although I would suspect that just as with an exhaust, there would be a performance loss if going with too large a diameter pipe (tube), I don't think 4" would be bad. Probably no more or less total airflow than going with 3", at least not enough in either direction to make a difference.

Now if you used a larger cone filter with a 4" opening and put on a ported TB, then maybe...