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Installation Tips For Those Tough Spots
Most every pre-’48 car came with fender/body welting, consisting of a simple combination of a narrow strip of vinyl (or similar material) folded over a small-diameter woven cord and glued shut. Its purpose was, and still is, to insulate one piece of body metal from another when bolted together—not an electrical or temperature insulation, but essentially to eliminate squeaks and rattles, and to prevent paint from chipping (or cracking) as the two pieces flexed and vibrated together under normal road use. Generally referred to as fender welting, this product can also be found throughout certain car models; used to mount grilles, running boards and bumper gravel shields.

Tuning A Marine Carburetor
There’s no escaping the fact that gasoline prices are out of sight. This has many boat owners wondering how to tune their engines so they can get more hours out of a tank of fuel, while at the same time improving overall efficiency. A properly tuned fuel and ignition system will allow your marine engine to perform at its potential and will be more enjoyable to use because it’s efficient and reliable.

MAKING GAS
Alternative-fuel sources and hybrid cars are all the rage today. Everyone from major automakers to backyard inventors is pursuing alternative fuels and energy sources. While the ultimate goal is generally to eliminate dependence on foreign oil, for hot rodders there is also the desire to invent and create a better-performing engine.
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PRODUCT SPOTLIGHT: The ProFlex DXI by Advanced Fuel Dynamics
Maximum Results with Minimum Effort: The Best Flex Fuel Solution for 2020+ GM V8 Trucks & SUVs
Author
The Auto Builder Staff
Photos courtesy of GM and Advanced Fuel Dynamics
Why You Should Be Running E85
E85 isn’t just for race cars. It’s a powerhouse fuel that’s widely available and seriously underrated. Here’s why you should be running it in your GM truck or SUV:
- More Power: E85 has an octane rating of 100-105, allowing for more aggressive timing and higher compression—aka more horsepower.
- Cheaper Fuel: E85 is usually way cheaper than premium gas, meaning you save at the pump while making more power.
- Lower Engine Temps: Ethanol burns cooler than gasoline, reducing wear and extending engine life.
- Cleaner Emissions: Less carbon buildup, fewer greenhouse gases, and a happier planet.
- Detonation Resistance: The high octane rating helps prevent knock, making your engine run safer and stronger.
- Renewable & Sustainable: Made from corn and other biofuels, reducing dependence on fossil fuels.
Advanced Fuel Dynamics: Born from Frustration, Built for Performance
Back in 2014, a tuner got fed up with E85 tunes that never seemed quite right. The problem? Pump E85 is all over the place when it comes to ethanol content, and a fixed tune can’t compensate for that. The solution? A real flex fuel system that constantly adjusts in real-time—thus, Advanced Fuel Dynamics was born. Since then, they’ve been cranking out battle-tested fuel solutions for street, strip, and dyno warriors alike.
ProFlex DXI: The Plug-and-Play Flex Fuel Revolution
Forget everything you know about flex fuel conversions. The ProFlex DXI is the first and only true plug-and-play flex fuel system for the Vortec 5.3L, 6.2L, and 6.6L GM engines. It’s like adding a cheat code to your truck or SUV—more power, better efficiency, and the freedom to run E85 or pump gas whenever you want.
Why the ProFlex DXI is a Game-Changer:
- All-In-One System: Everything you need to run E85, no extra parts required.
- 100% Dyno-Tested: Guaranteed performance, durability, and reliability.
- Patented DXI™ Technology: Real-time fuel adjustments with a 30-millisecond refresh rate, keeping your engine happy no matter what’s in the tank.
- True Flex Fuel Capability: Run gas, E85, or anything in between—seamlessly.
- Better Injector Management: More power and better efficiency on both gas and ethanol.
- Zero Tuning Required: Works with your stock ECU, so no trips to the tuner and no warranty worries.
- Half the Cost of Tunes: No expensive ECU unlocks or dyno sessions needed.
- Cleaner Emissions: Runs cooler and burns cleaner for a more efficient engine.
- Race-Grade Fuel, Pump Gas Price: E85 is high-octane and dirt cheap.
- Bolt-On Friendly: Works with power adders and other performance mods.
- FlexLink Compatible: Add the FlexLink module to monitor ethanol content live on your smartphone.
- Cold Start Plus™ Tech: No more hard starts in cold weather—fires up like a champ.
- Instant Response: No delays, no lag—just pure, real-time fuel management.
The Easiest Flex Fuel Upgrade You’ll Ever Do
No tuning. No special tools. No weeks of downtime. The ProFlex DXI is the simplest, smartest, and fastest way to unlock flex fuel capability in your GM V8 truck or SUV. Whether you’re after more power, lower fuel costs, or just want the ability to switch fuels on the fly, this system delivers.
To learn more and get your own Proflex DXI, haed on over to the Advanced Fuel Dynamics website today!
ARTICLE SOURCES
Advanced Fuel Dynamics
Performance Flex Fuel Systems





