6.2 Mods

[69 Post Sedan]

I just purchased a used 2016 Silverado Crew Cab, short box with 6.2, 8-speed, 3.42 rear and Max Towing Package. It only has 13,000 Miles’s on it. 

 

My my question is, what mods can I do to not void my warranty but still get a little more performance?  I don’t want loud exhaust but wouldn’t mind a slightly louder tone. I’ve read pros and cons with CAI......some say they work, some say they don’t. I’m completely clueless with tuners.......lol. 

 

I have no problem leaving it stock if I’m not going to gain much or screw with my warranty. I’m already very impressed with the difference between this 6.2 and my 2015 with the 5.3.

 

Any help would be much appreciated, Kurt 

[austingta]

I say leave it. CAI doesn't help. 

[Martha18]

CAI? No.

[69 Post Sedan]

A friend sent me this and I thought it was interesting.

 

https://www.coldairinductions.com/cold-air-intakes-really-work-dyno-test/

 

Not sure how factual it really is but I’d be interested in installing one for 15-20hp.

 

Kurt

[michigan2500hd]

If you want a slightly louder and deeper tone to the exhaust have the stock muffler cut out and install a Magnaflow 12909. You can leave the flapper or cut it out with the muffler. If you don't like it or sell it later you can swap back.. If the shop does it correctly. I left my flapper and have been experimenting with it opened and closed. I feel slightly more torque with it operational and I attribute that to the 6.2 having such a large diameter pipe.
Shouldn't hurt your warranty.
Also turning of AFM helps performance.
I installed a tuner and bumped up the throttle sensitivity and that helped a lot.

Sent from my SM-N950U using Tapatalk

[2018GMC]

Magnaflow 12909 - standard satin finish
https://www.magnaflow.com/products?partNumber=12909

Magnaflow 14909 - stainless steel (factory exhaust finish)
https://www.magnaflow.com/products?partNumber=14909

[goeb34]

I got a volant cai on my 2014 6.2 and could tell a get up and go difference but once i cut the resonator and both mufflers off there was a tad bit slower but looking to get it tuned soon

[truckguy82]

We have multiple data sources that prove CAI makes huge amounts of hp for the dollar and not a single person has done a before and after dyno and showed hardly any gains.

 

Don’t listen to anyone that says otherwise

[69 Post Sedan]

Thanks for the replies. I think I’ll get a good Cold Air Intake for it first. I’d like to buy a used one but I want to make sure it’s a good one. 

 

I do do have a good friend who has an exhaust shop that does excellent work so if I decide to change anything on the exhaust, I’ll have him do it.

 

The last thing would be some sort of a tuner that would help with performance.....but it seems there is a lot of different opinions on those too.

 

Kurt

[Lgetz]

Another vote for a Magnaflow 12909 to replace the OE muffler and flapper valve. 

[amxguy1970]

A tune will void your warranty, if you want to keep that then don't tune until after the warranty is expired. If you do a tune get a custom tune, hand helds aren't all that great. Getting rid of AFM doesn't improve performance, just lowers your mpg some and make it drive a little better in certain instances at lower speeds. A CAI (they aren't really cold air on the trucks) don't give much if any performance at all, it is all placebo effect (no one can feel 5 hp, especially in a 2.5 ton truck). Don't go to loud on the exhaust, it won't sound good when in 4 cylinder mode. Also stay away from chambered mufflers, they have a tendency to drone and don't improve performance (not to mention with all the other stuff like resonators, flappers and cats blocking the way they don't do much).

 

Tyler

 

 

[Mike GMC]

15 minutes ago, amxguy1970 said:

A tune will void your warranty, if you want to keep that then don't tune until after the warranty is expired. If you do a tune get a custom tune, hand helds aren't all that great. Getting rid of AFM doesn't improve performance, just lowers your mpg some and make it drive a little better in certain instances at lower speeds. A CAI (they aren't really cold air on the trucks) don't give much if any performance at all, it is all placebo effect (no one can feel 5 hp, especially in a 2.5 ton truck). Don't go to loud on the exhaust, it won't sound good when in 4 cylinder mode. Also stay away from chambered mufflers, they have a tendency to drone and don't improve performance (not to mention with all the other stuff like resonators, flappers and cats blocking the way they don't do much).

 

Tyler

 

 

This +1.

 

However, I'm not sure I agree that the CAI kits are worthless.  After having the factory intake silencer off, it looks to have a rather convoluted air path through it.  I would think just getting rid of that an putting in the straight tube with the stock air box would be an improvement.

[M1ck3y]

On ‎27‎/‎04‎/‎2018 at 3:35 AM, 69 Post Sedan said:

A friend sent me this and I thought it was interesting.

 

https://www.coldairinductions.com/cold-air-intakes-really-work-dyno-test/

 

Not sure how factual it really is but I’d be interested in installing one for 15-20hp.

 

Kurt

That's on a 5.3.

 

If you do a few more google searches you'll find the cold air inductions kit actually loses way more then it gains on the 6.2. Even on their website they only show the dyno from 3500 up. I actually have the intake for the 6.2 sitting in my basement, never should have bought it. Customer service is non existent. They don't answer questions, they just refer you to their website. And the quality wasn't there for how much it cost me.

 

DO YOU SEE THIS COLD AIR INDUCTIONS. I would very much like you to prove me wrong! 

[69 Post Sedan]

Well, I bit the bulitt and purchased an AFE Momentum GT dry air filter. With everything I’ve read and all the data/dyno tests, it had the best results overall (roughly 10hp/15tq). Well see if I like it or not.

 

I’m going to wait on a muffler just yet due to funds and I’m not sure what I’ll gain, if anything. 

 

Thanks again, Kurt

 

 

[69 Post Sedan]

53 minutes ago, M1ck3y said:

That's on a 5.3.

 

If you do a few more google searches you'll find the cold air inductions kit actually loses way more then it gains on the 6.2. Even on their website they only show the dyno from 3500 up. I actually have the intake for the 6.2 sitting in my basement, never should have bought it. Customer service is non existent. They don't answer questions, they just refer you to their website. And the quality wasn't there for how much it cost me.

 

DO YOU SEE THIS COLD AIR INDUCTIONS. I would very much like you to prove me wrong! 

That SUCKS!!!!

 

I based my decision on researching from websites and this test done on the Black Bear website with an actual 6.2 engine. 

 

http://blackbearperformance.com/IntakeTestResults_2016.asp

 

Kurt