Hey guys I'm new here and am trying to find out what are the best cats and intake to get the most horse power out of? I've read that the cats are the most restrictive part of the entire exhaust. Trying to beat my bro who's got a 2015 5.0.
I'm running a 13' g37x sedan. Stock.

 

Ha ha ha! You bought the wrong car.

You need to be looking at forced induction,

 

You will not be able to beat your brothers car that's for sure even with full bolt ons unless you run a boosted setup, anyways best cats are probably fast intentions resonated high flow cats which are great in quality and also the Stillen Gen 3 Intake or the new Admin tuning 3in full intake and also AAM has some. You might want to add a full exhaust like ARK and ECU Tek tune

 

Bore the block to 97mm, up the CP to 12.5:1, wait for JWT stage II cams and buy them, find a way to strip at least 500 pounds from your car, go with a 3 inch dual intake, buy a pair of shaftless 72mm throttle bodies, port match and polish your upper and lower intakes, get headers, run test pipes that are 2.5", get a CBE that is also 2.5", swap out your front and rear diff to 3.69, rebuild your tranny to handle the changes, and get at least some 285 width tires for the rear. Make sure you get the best tune you can, I would go with E85 for the added power. You still will not have the torque he does but you will have the power plus the benefit of AWD for launch and a slightly higher reving engine. This is presuming your brother's car is stock still.

 

Make sure you have the better Driver Mod

 

Race him on a rocky road and let ur awd do the work... Lol

 

Swap keys when he's not looking.

 

Figure out how to use the search function

 

Fill your brothers trunk w/ sacks of Quickrete

 

If you live somewhere that gets winter, just keep putting the race off for another 6 months.

 

Buy a GTR

 

HAHAH def bought the wrong car. the 5.0 will spank you even with full bolt ons. You need to go FI or get a faster car.
your AWD don't help either. It's a heavy pig

 

Not going to happen. Maybe nitrous?

 

Listen. We're bustin' your chops hard because of your stated goal. We'll still help with whatever mods you want to make.