• LT1 All-Forged 416CI Short Block 1000/1200hp

LT1 All forged 416CI short block

TMS Blueprinted lt1 bare block

Callies Compstar forged crankshaft

Manley H heavy o Callies Compstar rods 6.125" connecting rods

CP Carrillo Pistons

balance crankshaft

King main bearings

King rod bearings

GMPP cam bearing set

This short block is rated to 1000HP (1200HP with ARP main stud upgrade)

TMS 12 month warranty with the purchase of an oil pump

Premium short block upgrade available includes the following:
TMS custom ground camshaft
Adjustable timing set
Melling select high pressure oil pump
cam retainer plate
installation and timing of components
activation of your TMS basic warranty

*A crate is not required for a customer pickup*

Call for any questions: 972-853-2450

We are located at: 

545 Justin Pl.

Nevada, TX



All motors could require minor modifications for install (drill and tap holes or clearancing). These changes are minor and can be performed with simple common tools. Thompson Motorsports is not responsible for the work required nor does this warrant a reason for the return of the product, even in the case of a direct replacement. We are dedicated to customer service and are more than happy to help with the install in any way possible. Please feel free to call or email with any questions or concerns.

 All high performance motors will come with no VVTI or DOD. If the vehicle originally had either or both of these you will need to change to a LS2 front cover and LS2 valley cover to eliminate. You will also need to alert your tuner to the changes for PCM changes.

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LT1 All-Forged 416CI Short Block 1000/1200hp

  • Product Code: P-G4S
  • Availability: 999
  • $8,465.96

Available Options

Tags: short block, iron, LT