i have a 2wd f250 hd with a 460 at 236,000 miles .... best engine by ford but what is the restricter horns and cutting them for more power? on the intake or somethingthx

 

You will find them in the tubes going from the air cleaner box to the throttle body on the engine. it's the plastic piece the 2 hoses go to on the top of the engine.

 

thx but what does it actually do , and what do you actually cut off the plastic thing? i dont wanna f up my engine and im still kinda new to this stuff ....thx agian

 

they are just for the intake air to the throttle body. like a cold air intake system.

if you have a look at them you will notice that at the end they narrow down and have a flared opening on them. like a suction bell design. you cut off the narrowed section leaving the pipe one diameter right to the end. suppose to add about 20hp. talking to the people that have done it to their truck, it does make a noticeable difference in the truck.

rgds
Mike

 

It reminds me of what we used to do years ago, flip the air filter lid over to let more air in. Chevrolet was the worst, they would have a 1" diameter inlet for a 2 barrel 283 with 1 1/8" throttle plates.

 

dose anyone have some pictures of this

 

I could get a picture, but it wouldn't be until next week. I will be going to the races in Dover DE this weekend.

 

Lucky you! say hi to Carl Edwards for me

 

I didn't get to see Carl, but did get a shot of his Nationwide car. As for the restrictor horns, when the monsoon passes, I will get them for you.

 

Ok, here are the pictures. One is end view of openings, the other is actually bottom side of horns and top of the air filter.

 

Thanks for the pics i just cut mine off and the power increase isn't insane but free power is free power