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Any idea how much these manifolds improve your 0-60 or 1/4 mile times? I have a set waiting to go into my truck, but I'm in the middle of moving and remodeling half of our new house, so it'll be awhile before I can do any testing.

No re-gearing is needed, but if you did want to make up for the change in tire size to gain back some acceleration, 3.73 or 4.10 gears would be much more appropriate than 4.56 gears. I'm not sure what your stock tire size was, but the jump to 35" tires isn't that big and many 35" tires are...

A 50°F difference is pretty big, how high were the temps getting? I took some temp measurements last year on a 70°F day after my truck had been sitting for 5 hours, I'll post the results below. I should have waited longer for the ECT and ATF to come down to ambient temp, but I was impatient...

Have you scanned the vehicle for DTCs? Did you enter the new Solenoid Body Strategy when the valve body was replaced or did you just reprogram the PCM? If you look at the live data with a scan tool, does your transmission have good line pressure?

I run Bridgestone Blizzak DM-V2 snow tires on both of my vehicles and I'm very happy with them. They handle steep inclines very well and make it easy to drive up or down icy roads with confidence even when I can see that other vehicles have already crashed into each other or slid off the road...

A physical failure is definitely a good possibility to keep in mind when you get a P0420 or P0430 code, especially on modified vehicles making significantly more power than stock. It's very easy to hit catalyst over-temperature protection at higher power levels, and you can hit at surprisingly...

If mine looked anything like that there would be multiple other warning signs like high back pressure, rattling, misfires, high knock retard, bad fuel trim readings, or an unusually high octane adjust ratio. Obviously you would never want to drive a vehicle with a catalyst that was physically...

In my case I would be willing to bet that excessive idling and short trip driving are the main issues. My commute to work is only 3.4 miles and I recently bought a house that is 2.1 miles from our current house, so my driving is mostly very short trips moving things between those locations...

I've been doing this at the shop I work at for a few years now, and so far we've had a 100% success rate. None of the vehicles have come back with a P0420 or P0430 code yet and some of them were so bad when they first came in that we thought trying to recondition the catalysts would be a...

I'm enjoying the extra HP I'm getting now that we're getting some cold weather in my area. A 3.5EB making 602HP at the crank isn't bad for 93oct, an intercooler, and a tune.

My truck recently started throwing a P0430 code. When I cleared the code, it would routinely come back within one or two days. This happened across multiple tanks of fuel from different stations, so I knew that bad fuel wasn't the issue. I also know that my 25,000 mile truck has no maintenance...

Failure mode effects management, it's just the phrase used in the PCM instead of limp mode. In my case, pre-ignition FMEM shows up as an active limiter when my truck goes into limp mode because of excessive pre-ignition being reported by the knock sensors. If you think the noise is bad on our...

The wastegates are almost never completely open or closed, they are usually somewhere in between those positions and they can easily rattle under boost. Mine rattle enough to trigger knock retard and pre-ignition FMEM because the knock sensors hear them loud and clear. My truck currently has...

The big issue is the culture of this industry. This industry is filled with incompetence, ignorance, laziness, unearned arrogance, and entitlement. We generally have no educational requirements and no real barriers to entry in this industry, and that means we attract the worst people. Some will...

This is a very real thing, a loose heat shield or anything else that gets picked up by the knock sensors can severely limit boost pressure and spark advance, and cause your truck to be down well over 100HP.

You should be able to hit at 5.7s 0-60MPH or very close to that pretty easily. I would start by giving the truck a good inspection and checking things that would often go unchecked on a truck with such low mileage. Make sure the brakes aren't dragging and make sure the air filter is clean and...

It was a loud high pitch squealing that occurred during almost every normal brake application once the brakes were warm. I tried everything to get them quiet, but they still squealed.

This list of possible causes is very long if you get into specifics. Some common issues are loose heat shields rattling, anything touching the engine that could rattle or vibrate when you go WOT, slip yoke binding, vibrations from the suspension, ect. On my 2014 5.0, I had lots of false knock...

I'm doing all the tuning myself so no issues there. My tune is based off of a file that was provided by HP tuners in 2023 back before our PCMs were fully unlocked. I wouldn't mind getting a newer calibration as a starting point, but I'm not looking to cause unnecessary problems either.

I only ever had one set of pads that were louder than the EBC ExtraDuty pads, and those pads were loud enough that people grimaced and covered their ears as I pulled up to drive-thrus. The EBC pads were a GG friction rating and I would think that the ACDelco Gold Professional Ceramic HH pads or...