scrapen

I am assuming you are referring to a swap from L83 to L86. The MIT tube is identical between L83 and L86, and yes the only difference is the silicone coupler. L83 - MIT 3.875" to 3.5" TB L86 - MIT 3.875" to 3.875" TB

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TB end for L86 is 3.875” vs 3.5” on the L83...hence why the intakes have different part numbers. Sent from my iPhone using Tapatalk

It’s my understanding 2016 came standard with HID’s due to lighting complaints. Maybe they’re just adjusted high from the factory. It happens to me on occasion.

If I remember correctly the brand used by Costco is the only one listed for top tier diesel. They have their own website listing all the brands that meet their standards. Some you have to do some digging for their source like grocery store chains. Around me I think sheetz is the only brand that doesn’t meet top tier for gasoline. Sent from my iPhone using Tapatalk

Top-tier or not US spec USLD should have additives added. GM isn’t the only one having issues with fuel destroying pumps. Sent from my iPhone using Tapatalk

If I had to do it all over again I’d go Texas speed w catted y-pipe. I went with the speed engineering coupled w my corsa and while it sounds great, the rasp gets to me a little bit....although when my windows are up I’ve found it doesn’t bother me. Also had to go to Summit Racing for better clamps after initial test drive.

An oil thread started and was shut down a few weeks back. Now old threads are being dug up for the same. We get it you use brand x, but it doesn’t have to be every post. We are on this forum because we all share that we are enthusiasts and can help each other out with common maintenance and issues. I’d say most of us can make our own adult decisions on what we use for maintenance. Spamming these threads in the end doesn’t make it any fun for any of us when moderators have to treat us like children. Sent from my iPhone using Tapatalk

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Hope to see your results since mine is very similar and I haven't dynoed it yet unfortunately. I drove my truck a couple times before my tune was installed after headers and yes the helicopter sound known as v4 was amplified significantly. The AFM delete will take care of it.