I'm located in Seattle 
Bfi
I am actually selling a complete intake with BFI done to it in the classified section 
https://www.clublexus.com/forums/sc4...-car-sale.html
https://www.clublexus.com/forums/sc4...-car-sale.html
Pole Position
Joined: Aug 2014
Posts: 330
Likes: 0
From: GA
your car doesn't need it. that box with holes cut out doesn't really do anything.
you will benefit more by going to home depot, getting some laundry ducting, and installing it from inside the bumper to your intake area.
you will benefit more by going to home depot, getting some laundry ducting, and installing it from inside the bumper to your intake area.
Lexus Champion
Joined: Jan 2014
Posts: 2,089
Likes: 52
From: illinois
it definitely works, everyone that has done it agrees. and i mean everyone.
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I had done the same thing and it makes a noticeable difference. may not be as good as bringing in air from outside but the front of the airbox is basically right behind the headlight and not in the middle of the hot engine bay so it still does pretty decent.
I haven't re-read the Planet Soarer page, but weren't those gains reached with the box sealed off from the engine bay?
It's no different, really, than complaints of cone filters lessening performance on the SC. They pull from the same space as an unsealed box would. The numbers I've seen for other cars (haven't seen any for the SC) indicate that under-hood temps will remain high even in "out of the way" corners like behind the headlights if not sealed off.
It's no different, really, than complaints of cone filters lessening performance on the SC. They pull from the same space as an unsealed box would. The numbers I've seen for other cars (haven't seen any for the SC) indicate that under-hood temps will remain high even in "out of the way" corners like behind the headlights if not sealed off.
The best is if you seal it off like the planet soarer page, but if you are too lazy to do that then I think the next best is the holes in the front of the airbox.
no one is doing a before and after dyno to compare for a 10hp gain so people will just have to decide for themselves.
the cone air filter sits further back some with the adapter and gets purely engine bay air, all hot.
the holes in the front are sort of a half half compromise that does seem to work, I tried the cone filter, and the bfi with just holes in the front, and stock, and and the best one by the seat of my pants dyno was the bfi with the holes in the front. it was much better than the cone filter, the cone filter completely ruined the power band. stock was better than the cone filter, but seems like it was restricted a little bit, or its all just in my head. I have a turbo and intercooler now so yeah large air filter sucking in hot air and I couldn't be happier but in my more stock days I rocked the basic BFI with a drop in k&N filter.
no one is doing a before and after dyno to compare for a 10hp gain so people will just have to decide for themselves.
the cone air filter sits further back some with the adapter and gets purely engine bay air, all hot.
the holes in the front are sort of a half half compromise that does seem to work, I tried the cone filter, and the bfi with just holes in the front, and stock, and and the best one by the seat of my pants dyno was the bfi with the holes in the front. it was much better than the cone filter, the cone filter completely ruined the power band. stock was better than the cone filter, but seems like it was restricted a little bit, or its all just in my head. I have a turbo and intercooler now so yeah large air filter sucking in hot air and I couldn't be happier but in my more stock days I rocked the basic BFI with a drop in k&N filter.
I find that an intercooler and turbo are pretty good for cooling air AND power gains 
BFI definitely gives you the impression of being faster. Not many people will dispute that. It adds some noise when you're hard on the gas and helps get more airflow to the filter area.
I liked it. Worthwhile mod that gives you instant gratification. Just don't expect a miracle.
BFI definitely gives you the impression of being faster. Not many people will dispute that. It adds some noise when you're hard on the gas and helps get more airflow to the filter area.
I liked it. Worthwhile mod that gives you instant gratification. Just don't expect a miracle.