Skip to main content

Custom Fabrication and Exhaust System

4:20
21:19
33K views

At 4:20 in

LSXcalade Twin Turbo Engine Setup Details! Why Does it Work So Well? (Tips For Your Own Build)

What happens here

Mitchell describes his custom fabrication work, starting with the exhaust headers which he built himself. He notes that the original design conflicted with the larger valve covers required for the shaft rockers, leading to further modification. The engine is positioned slightly off-center in the engine bay from the factory, which added complexity to fitting components. The exhaust system features a 3.5-inch diameter, transitioning from stainless steel near the turbos to aluminum towards the rear for weight reduction. He also converted the throttle body to a drive-by-cable system, using a G-Plus throttle body from eBay with a custom sheet metal bracket for the throttle cable and a shaved alternator for clearance. The V-band flange was also welded on by him.

Goal: Explain the custom fabrication work, including headers and throttle body conversion, and the exhaust system design.

Tools and materials

  • 3.5-inch Exhaust Tubing DIY — The main exhaust pipe diameter, made of stainless steel and aluminum
  • Custom Fabricated Headers DIY — Directing exhaust gases to the twin turbos, designed and built by the creator
  • Custom Sheet Metal Bracket DIY — Mounting the throttle cable for the drive-by-cable conversion
  • G-Plus Throttle Body G-Plus — Used for drive-by-cable conversion, offering tactile feedback
  • Grinding Tool — Shaving the alternator for clearance
  • V-band Flange — Connecting exhaust components, welded to the throttle body
  • Welding Equipment — Fabricating headers and welding the V-band flange to the throttle body
  • Wolf Aircraft Tubing Wolf Aircraft — Material for custom turbo kit components

What they say

Hide

because i did that like i said in my last video i haven't had this header or that valve cover off in two years it's a stock oil pan stock truck oil pan stock truck accessory brackets stock truck ac i did have to convert it to a drive-by cable throttle body to run with the ms3 but i actually kind of like that because it's more responsive that way like it's a lot you know you have more tactile feedback with your foot with uh this than you do with the uh the drive by wire ones um i made these headers myself this was actually the first thing i ever fabricated at a tube like this piece of tube right here was the first one i ever cut at my shop like i actually learned a lot about header making through uh way back when finnegan started youtube he had the video making headers on his jet boat and i learned all about you know the rock test and all that stuff so i just kind of like started doing it and it came out great i made the whole turbo kit myself all the way from the intercooler which i have another video explaining just the intercooler from uh you know a couple weeks back you should go check that out but it's uh these valve covers are from some they're just like eddie motorsports or something i think and i originally made these headers off of the stock motor with the stock valve covers before i knew that i was gonna need shaft rockers so um that's why when i was consulting with cam motion and frankenstein they're like man you need shaft rockers on this thing because the stock rockers are going to be run under my wall at like 1700 horsepower like it's not a good idea so i'm like well crap all right so i got the shaft rockers but i had to get bigger valve covers to clear the shaft rockers which got in the way of my header so you can see here i had to play with the spacing on the headers one because the motor is not actually in the middle of the engine bay but also because now that valve cover did not fit behind the header so what i did is i back welded the valve cover like i welded the inside of it to build up material and then i shave the outside so it's kind of like radiused around that header excuse the oil mist there but it's it's kind of like it was hard to get those in the same place because the collectors are in the same place relation to the engine bay but the engine is actually skewed over a little bit just from the factory like they're all like that and if you just notice that now it's going to ruin your life because they're not in the middle of the…

Auto-generated from the video audio.