NemesisC5

Looking for the Touring muffler as well for my 2023 TB w/ 6.2L. I can’t see scrapping the entire exhaust system and purchasing Borla Touring exhaust only to gain a better sounding muffler. I like the True Dual systems, however the S-Type is just a little too loud at startup for my neighbors at 5 am.

Good looking (from what I can see in the pictures) for those that like clean oem lines and fitment. Just purchased 23 TB black/black loaded 6.2 with 20” wheels. Definitely need wider tires and I’d like to add these or similar flares to give a more rugged look.

GM accessories/parts exhausts specify Borla for most systems, however they offer another exhaust that doesn’t state the brand, that one is made for GM by Corsa. It is similar to Corsa touring, possibly even quieter, however a little more more growl than oem. I had this dealer installed at delivery on my 2017 6.2 for $1195, all top quality components. I purchased a 2023 LT Trail Boss 6.2 yesterday and see basically the same exhaust however with more piping mimicking oem to connect to twin oem HDMI tips. I can’t recall exactly but it lists for over $2k. These are made for GM by Corsa without the Corsa designation but people familiar with Corsa will recognize the components and quality.

Mine came on Friday along with po50D. Monday after that my AC quit cooling, found leak in condenser coil...wth is up with GM? May be time to look into another brand truck.

I think most know of Kinney’s Muffler Shop in Texas however if not check out the link below. In my opinion they set the bar for custom exhaust systems with many videos to see and hear different combinations on a wide range of vehicles. If I remember click the ”videos” link on home page and it brings you to their YouTube channel. http://www.kinneysmufflershop.com/kinneysmufflershop.com/HOME.html

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Every time I accelerate I'm happy I chose to stay with 6.2. I had a 2009 5.3, 2011 6.2 and now 2017 6.2. While my truck was in shop for TSB (tranny triple flush and new fluid) the GM loaned me his 2019 5.3 and I noticed it was less responsive from a stop but seemed to build revs more quickly once above ~2500 rpm. However, once I picked up my truck the difference in low speed torque was very much in favor of my 6.2. I have a heavy right foot and enjoy the feel of acceleration so the extra cost for premium 93 and higher cost of the 6.2 are choices I'm happy with. Just crossing 36k miles now and the motor "feels" like it is more responsive now than when new off the lot. A 2020 with 6.2 and A10 has been on my mind but sitting tight to see if/when a model with larger motor or supercharged 6.2 will become available. I don't do any towing so that has not factored into my assessment.

GM performance CAI likely comes with revised MAF tables to compensate for the lower restriction rather than a more aggressive performance tune just to keep things safe. I'd be surprised if the GM tune includes any timing advance.

Airaid MIT (intake tube) 200-996 used in great condition, removed from my 2011 Silverado 1500 6.2 before trading in. It's been sitting on a shelf in a closet since I purchased my 2017 in December 2016. In original box. $100 shipped...PayPal only.

2017 Midnight LTZ Z71 6.2 did the first triple flush and shudder never went away. Did a second triple flush and shudder returned after 3k miles. Earlier this year dealer flushed and filled with the new fluid along with re-learn on TCM. So far shudder is gone and shift performance is more responsive, feels like a new TCM tune. Service manager said I may experience rough shifts during re-learn (which I have not) but put 2k miles on and if shudder returns they will replace converter. Thus far after 1k miles all is well.

I ran across the GM HP filter in the My Chevrolet (Onstar app) and posted as a "new find". The description says it has 5 fewer pleats and lists it flow rate. Indeed very expensive at $125 MSRP, for reference the AC Delco High Capacity air filter #A1518C is listed at $75.xx on Rock Auto which is very expensive as well IMO. It seems GM trusts the pleated paper filters to keep out dirt and optimized the design for increased flow while maintaining filtration efficiency/capacity. I ended up purchasing the AFE 31-10004 for just over $43 which seemed to be a balanced choice based on what I read in link below. The article was from 2009 so I'm sure there's something better now however didn't want to spend too much time splitting hairs on a drop-in replacement. https://www.nicoclub.com/archives/kn-vs-oem-filter.html

GM 84520923 Upgrade the performance of your vehicle with this Chevrolet Performance Replacement Air Filter. Rigorously tested for durability, long-term efficiency, and seamless integration, the filter has been tested to reduce airflow restriction by up to 10% at 330-g/s, providing increased performance both on and off road. Built with a performance appearance, this drop-in replacement filter contains 5 less filter pleats, which allows for an increase in airflow performance, and boasts a filter efficiency of 99.5% when tested to ISO5011. This filter requires no additional calibration and does not void the New Vehicle Limited Warranty. https://accessories.chevrolet.com/product/performance/performance-air-filter-84520923?year=2017&make=Chevrolet&model=Silverado 1500&categoryId=12009

I saw this GM 'high flow' drop-in replacement filter element today. Expensive. https://accessories.chevrolet.com/product/performance-air-filter-84520923?year=2015&make=Chevrolet&model=Silverado 1500 Description Upgrade the performance of your vehicle with this Chevrolet Performance Replacement Air Filter. Rigorously tested for durability, long-term efficiency, and seamless integration, the filter has been tested to reduce airflow restriction by up to 10% at 330-g/s, providing increased performance both on and off road. Built with a performance appearance, this drop-in replacement filter contains 5 less filter pleats, which allows for an increase in airflow performance, and boasts a filter efficiency of 99.5% when tested to ISO5011. This filter requires no additional calibration and does not void the New Vehicle Limited Warranty.

The spacers you are referring to were designed to induce swirl improving air/fuel mixture and atomization for better throttle response, however as you said they did little to nothing except make your wallet a little lighter. The spacers available for GEN 3, 4 and 5 are designed to add intake plenum volume for better throttle response, however the tiny increase in volume they provide would likely yield similar results to the old style mentioned above. Adding plenum volume to increase flow is a proven concept in both air and fluid applications however in the auto industry any positive results are typically over exaggerated and over marketed.

Those look great! I read where they attach with fasteners into existing holes and 3M double sided tape along the outside perimeter. Is there much or any gap along perimeter where they meet the paint?