Intake compatibility- L84, LT4, and LT1
 

Is there a source showing what components are interchangeable on the new Direct Injection engines? Will the LT4 supercharger bolt on to a 5.3 L84? Will the LT1 intake bolt on a 5.3 L84? I have not found much in terms of what items can be swapped.

Yes, the LT1 manifold will fit on a L83 (5.3). It is a popular upgrade on these new LT's. I have a 2014 Silverado with full bolt ons. Next upgrade will be the L86 intake manifold and throttle body though. The Lt1 intake requires either a pulley change or throttle body bracket to reroute the angle since the LT1 snout points down, which is right in the way of the belt pattern on the truck accessory

Holley offers a wedge to alter the TB

Supercharger will not. You need adapters. I’m pretty sure the head bolt pattern is different on the LT4 heads vs the Lt1 and truck motors.

As for L83/4/6/7 these motors in 2019 only got the upgraded DOD so the intakes are interchangeable still. Lt1 will bolt right up. Check out my build thread, i stuck One on my l86.

Search Swaptime on YouTube. He has a good video in regards to fitting and selecting the correct lt4 blower on a 5.3.

so a 2019 lt1 intake manifold and throttle body will fit on my 2017 L86? Tried looking at your build but couldn’t find it.

yes it will. You need to flip the TB and grind down the alternator and TB motor housing a little and it will fit.

thanks for the reply! So that’s all there is too it? Will the computer adjust accordingly or would I absolutely need a tune to see any improvements? My truck is still under warranty but if I can swap and leave stock tune I’ll do it now and just tune it after warranty comes close to ending and plan on doing a cam swap and dod/afm delete along with LT headers.