A nice little intake mod AU. + horsepower

[HULK_I6T]

I have a au series 3 4.0L i6 auto.

It has the following mods, 2.5 inch cat back exhaust and panel filter, plus xr6t snorkel. I also have an air deflector fitted behind grill.

Anyhow under WOT I noticed the car would change up at just before 5000rpm, to me it felt like it was a little too soon. Surely I was giving up a few kW up top.

So I did this mod as a test.

1. Replaced the pipe from airbox to rest of intake with a straight piece of 3inch aluminium pipe. Removed fitting from airbox lid to get it in.

2. Flicked the panel filter and Grabbed a 45 degrees 3 inch pipe and fitted up a 3 inch pod filter inside the stock airbox. Used a 3 inch piece of silicone hose to join the two pipes.

RESULT:

There is a noticeable difference in off the line, mid range and top end power. It now is happy to rev out to 5200-5300rpm before changing up and feels more powerful in doing so. There is a little bit more induction noise from the pod but it's enclosed in the stock airbox. Great mod... Under $100 all parts.

The stock intake pipe that I removed closes up to about 2 inches at the point of the airbox, it must be restricting the power. There is probably going to be a fuel economy advantage as well.

To compliment this mod, I'd grab a xr6t snorkel and also the air deflector you can make yourself with a bit of aluminium sheet.

If your AU is changing up before 5000rpm @WOT try this intake mod and enjoy the benefits.