On the 5.7 where would you put cutouts in the exhaust. Im thinking right between the cats, what do you guys think?

of course you know that any thing you do before the last cat is against federal law. in some parts of Calif, after the first 5 yrs we have to have the emissions tested every two years. they do a visual inspection, test the gas cap for vacuum and pressure(if you do not tighten the gas cap it will turn on a code light and set the code in the computer so you have to have it cleared before they will do the test.) then they put your car/truck on dyno rollers and do a exhaust emissions test at low speed and 45 mph under load. don't pass - can't regester the vehicle. if you put on a cut out it might as well be before the first cat to relieve the most back pressure.

I have a question....WHY WOULD YOU WANT TO???

Drill some 3/4" holes in your airbox while you're at it.:tu:

I have a question....WHY WOULD YOU WANT TO???

Not to be a wise a$$, but ya, why would you want to? What is it you are trying to achieve ? I guess I'm just not clear on what it is you are trying to do.

You'll lose torque and add some power way up top as well as a whole hell of a lot of noise.

I am a big fan of noise. I am from Kentucky and we dont have emissions test here and I am trying to get the most out of these trucks. Plus when you have a dyno in your back yard you like to try things. I have had many camaros and cutouts were always one way to get a little more for the money. I want to see just how fast I can get in the quater mile before I go with the nitrous and so on. I already have a hooker exhaust and going with the K&N Intake and throttlebody spacer. I am working on a few other things as well. I am just one of those guys who is on the performance end of things. I want to be the first double cab in the low 13s if possible. So any help is greatly needed.

Sorry mxsjw my air box is gone and no coffee spilled is not a mod, guess thats why your wanting me to drill holes in the airbox you dont have a clue!!!

You need to have some kind of backpressure on these engines otherwise you are going to have problems. Just go with a custom exhaust and high flow mufflers. I did and it makes more noise and I got a performance increase and still kept my factory warranty. I also have a CAI and TBS. Just a thought, especiaaly since Toyota is so proud of their repair dept. and hourly rate.

Well go for it then...not my idea of fun. I might just spill some coffee in my cupholder though....

Yea you will spill the coffee when I come by you with the cutouts open. But hey Ill stop and get something for you to clean it up. But hey that is how I do it.

You need to have some kind of backpressure on these engines otherwise you are going to have problems. Just go with a custom exhaust and high flow mufflers. I did and it makes more noise and I got a performance increase and still kept my factory warranty. I also have a CAI and TBS. Just a thought, especiaaly since Toyota is so proud of their repair dept. and hourly rate.


I already have a custom exhaust, Im hoping that the one cat will give it enough backpressure. Will see. thanks for not being a smart a$$ there seems to be alot of them around here, kids these days.

"on the performance end of things" ?
Yet you mentioned a TB Spacer ? :clown:

Gotcha' :rolleyes:

Negra yea you got me!! Hey but its got to help something so why not maybe to drill into to put a shark nozzle for the nitrous. Oh well have to wait and see.

I think cutouts are great but I think they should be used with forced induction and/or high horsepower motors. I think it just may be overkill for a Tundra.

I'm not saying it's a bad idea, but you probably just won't get as good of results as you may have seen in the past with your camaro's.

If, or when, they make a higher stall converter that would also help, otherwise you'll just bog off the line, especially with the lack of back pressure caused by the cutouts.

I am a big fan of noise. I am from Kentucky and we dont have emissions test here and I am trying to get the most out of these trucks. Plus when you have a dyno in your back yard you like to try things. I have had many camaros and cutouts were always one way to get a little more for the money. I want to see just how fast I can get in the quater mile before I go with the nitrous and so on. I already have a hooker exhaust and going with the K&N Intake and throttlebody spacer. I am working on a few other things as well. I am just one of those guys who is on the performance end of things. I want to be the first double cab in the low 13s if possible. So any help is greatly needed.

Could possibly be the funniest post of 2007.:tu:

Definately the first person I have heard of that has a dyno AND is asking where to cut holes in his exhaust for performance.

...classic.

Could possibly be the funniest post of 2007.:tu:

Definately the first person I have heard of that has a dyno AND is asking where to cut holes in his exhaust for performance.

...classic.
Kinda just wanted some feedback and maybe some input from other people I didnt say i didnt know where to put them just trying to see if anyone else has tried them. Anytime you want to test me on cars let me know. Or better yet ill put you in my 10sec camaro and watch you sh!t your pants. Bet you cant even change your own oil. So if you got the balls try me!:devil:

Whatever :sleep:

Alot of guys on here got the balls to run that jaw but when push comes to shove they tuck there tails and run. You guys know who you are. Anyone else want to be a smart a$$?

If these beasts act in any way similar to the Hemi, get the cutouts. They provide excellent gains in the 1/4 mile on the hemi. Plus when you want it quiet all you need to do is flip a switch! :tu:

I say try it and see what happens. I would love to do this myself but don't have the time nor money atm. As someone else mentioned, I'm sure much larger gains would be seen under a force induction set up. But what the hey give it a shot, may be just what the 5.7 needs. Good luck and please post pictures/videos.
PS ignore the a--holes

On the 5.7 where would you put cutouts in the exhaust. Im thinking right between the cats, what do you guys think?

I wouldn't try that myself, but if you're willing to be a guinea pig, try installing the cutouts between the cats. Of course you'll be voiding your emissions warranty, but if that doesn't matter to you I'd say go for it!

Finally got some guys on my side. They will be put on after christmas, i cant wait to see how the beast will sound. Thanks for the input and dynos sheets will be up soon.

http://photos-b.ak.facebook.com/photos-ak-sctm/v156/210/27/508861147/n508861147_429281_9272.jpg

I say if you are gonna do cutouts, you gotta do remote cutouts. Its gonna suck having to get out and undo wing nuts. I say go for it.

Remote is the only way to go!!!!