When I get my electric fans installed sometime later this spring/summer, I'll make a custom full CAI and heat shield, but this will do for now. I used one of the mandrel bends that I bought for the CAI I'll build later and a couple of rubber connectors that I had from a previous CAI experiment (I'll use 3.5" silicone couplers for the final version). Once the fans get put in, I can replace the factory plastic piece (which is the most restriction in the factory intake IMO). The filter is a 12" long S&B powerstack from EBay for $22 shipped new.

I also made a velocity stack since I couldn't find one locally in the 6.25" to 3.5" size that I wanted to use. I cut a small length of 3.5" pipe, welded on a 6.25" circle, then used Pi x R squared to figure circumference and trimmed, then rolled a 2" wide strip to make the 6.25" diameter pipe for the filter to bolt to. I stretched a T-shirt around the 6.25" side, held in place with a worm clamp, then pushed it down into the 3.5" side using a circle of wood 3.25" in diameter (from a hole saw)... then coated it with fiberglass resin... confusing in words, I know... anyway, here are the pics...








It's a nice seat of the pants gain, especially above 3500 RPMs. It's like there's a secondary system that kicks in...

 

Looks good wanna make me one?

 

VTEC SILVERADO SS wOwZeRs!!!

Looks good, I did about the same thing on my truck at one time.

 

Sure, let me scrounge up some more plumbing parts from the high performance mecca that is Home Depot... For a temporary test, this provided quite a gain by the butt dyno (recently calibrated by the way). I can't wait to get the plastic part replaced...

 

Yeah do what I did and just get a smooth tube from the TB to the MAF, I got an air raid intake tube for mine. That is all you'd need, probably flow the same as an aftermarket intake.

 

Even better... the mandrel bend you see in the pic is a 3.5" piece from Ebay for $8 each... Once I get the electric fans on there, the stock plastic piece is gone.

 

Looks good, thats kind of what I had in mind of doing. Just running the pipe down to a filter under where the airbox sits.