SC430 Air Intake Systems
The Injen intake you noted is a warm/hot air intake, not a cold air intake. Take a look at the installation of the stock intake.The air inlet is out front in the cold air stream and does not have to deal with hot engine compartment temps. It all about the temps. Flow is good but cold air is best for making Hp! The engine compartment in the SC does not have a cold air path to the intake for the Injen you note.
I own this intake and installed it on our SC. Here's what I can prove:
- Better sound from the engine.
- Better looks in the engine compartment
- Lumpy idle in hot weather. (No cold air intake path)
- No increase in mileage
I have no idea about a Hp gain but as a degreed, licensed, practicing Mechanical Engineer with a fluid dynamics background I can tell you that unless you are dropping the intake temp 50+ degrees or so below what the engine compartment is, the Hp gain is NIL. You in fact may lose Hp and I believe this is the case in the dead of summer in North Carolina with our SC.
Not saying don't do it, just make sure the numbers they post pass the sanity check!

Here is the new intake system and i am going to post pictures of my new rotors and brake calipers on my other forum. I cleaned the engine compartment


I have my finger on the trigger on an injen, but have paused it basically due to the fact that all I've read on this forum is that there is no HP gain, no noticeable torque increase, just some aesthetics and sound differences. I'm wondering if I am better off just putting a drop in K&N or Blitz (they make a nice one too) and call it a day?
and i'll post more pictures after i put my new pedals in
Celebrating Lexus & Toyota from Around the Globe
Yeah the cold airflow is a problem with the Injen because you lose the stock diverter, which I knew before I purchased it, but I like the sound a lot so it was worth it to me lol. I was looking at constructing an air tunnel out of sheet aluminum to get more air on the filter but never got around to it this summer. It's pretty tight in there.









