If you can get a good deal on a Roush cai it is a great quality piece.
I loved mine on the old car. It fit the stock tb and accepted up to a 75mm.

Tha tube was a kind of flexible composite and didn't absorb engine heat as much as metal.
The filter ran into the fenderwell as well.
When you buy a CAI....like most things in life....you get what you pay for.

Good Luck on whatever you choose.

 

I know I "felt" like I gained HP, car sounds better and sounds neat too, which gives the false impression of HP gain. Only way you'll get any real gains is if you get a tune along with it.

 

If I get the BBK TB/PLENUM combo...78mm...Will that be compatible with my MAC CAI?

 

Yup, should be fine.

 

Why not going with the JLT Ram air or Cold Air Intake ?
It's 4", in PCV and you can have it painted to match your car color.
I had one on my 4.6 and I've one on my 5.4. really worth it !

 

That is the kit i think i will be going with for my '01 Bullitt intake.Heard nothing but really good reviews on the JLT.

 

you won't be disappointed

 

I would have gone JLT if I didn't get a steal of a deal on my TUNABLE INDUCTION by DEMOLET.

 

You will gain HP not noticeably, but if you have exhaust it will make a difference, it would be like trying to breathe through a straw without a good intake.

I have a WMSRacing intake. It hooks up to the factory rubber and in my opinion is way more restrictive then the BBK. I bought the car with this on.

 

I went with the Steeda kit....and then got it airbrushed