My K&N RX-4750 arrived today, completing my parts list for my intake upgrade. I was using a drop-in K&N filter in the stock airbox before. My install is virtually exactly the same as Tumbleweed'* 96 SSE, but I don't have a loose PCM and my air intake temp sensor is different. But I used exactly the same parts, literally cutting and pasting from his post:
Auto Zone pipe part # 8219 $42.00 (cut down by 4")
K&N RX-4750 from AJ USA $49.00
Silicone 4" - 3" reducer part number PWRR40-300/400 $26.00
$117.00 for parts and about 2 hours to install.
I used a hot soldering iron to slightly enlarge the air intake temp sensor hole in the K&N filter, based on other people saying that worked well. It did.
Before starting project:
Stock airbox removed (and old sticker):
The Autozone rice pipe:
I used a hacksaw to cut off about 4" off the pipe. Deburred with emery paper and a file. 4" to 3" silicone reducer is attached:
The cut-down intake with the air filter, air intake temp sensor, and the lengthened wiring for the temp sensor:
The lengthened temp sensor wiring installed and split-loomed into the wiring harness:
Temp sensor plugged into the K&N filter:
I made a shield out of this aluminized insulation I had lying about. I don't know what this stuff is called. It'* very simple, and I think it does the job:
The completed intake installed. Engine cover is off:
All finished and buttoned up:
Test drove: WOW! This makes a definite improvement! When I had the dual exhaust Magnaflow muffler installed, I'm certain that I lost some low end torque. In fact, it was mildly annoying. Now it'* all back and then some! And there'* a growling beast lurking under the hood of my car. Now it has a strong, powerful pull all the way through the RPM ranges, and it literally feels like it leaps and awakens to life when I step on what I now call "the happy pedal"!
Seriously folks, this is, in my opinion, the biggest bang-for-your-buck DIY modification you can make, followed by ordering a performance muffler and some tips and paying an exhaust shop to weld them on. Together, they make a mighty improvement. There is a "snorkeling" noise on cold startup that others have mentioned, but it went away after about 60 seconds.
I'm very impressed with this upgrade, it makes quite a difference!