Fully Forged 6.0 Iron Short Block 370/408CI STAGE 3 1000/1200hp

Blueprinted GM block seasoned core

CP Carrillo, Diamond, or Wiseco shelf piston with GFX file fit rings

Steel ring set

Callies Compstar or Manley H-beam 6.125" connecting rods

Callies CCW 3.622" or 4.000" Crankshaft

King main bearings

King rod bearings

Thompson Motorsports single piece racing cam bearings

12 month unlimited mileage warranty with the purchase of a new melling oil pump from TMS

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

Frankenstein Thompson Motorsports edition M311 heads
11* CNC ported aftermarket casting 6 bolt heads
Extreme duty stainless intake and extreme duty solid exhaust valves
Billet Rocker Rails
PAC .007" platinum springs

Thompson Motorsports custom ground Camshaft

Billet adjustable timing set

GM MLS head gaskets

ARP Head Studs

Trunnion Upgraded Rocker Arms

Melling Select High pressure/High Volume oil pump

Thompson Motorsports high RPM lifter set

GM lifter trays

Thompson Motorsports custom length Chromoly pushrods

Thompson motorsports Professional assembly and 12 month unlimited mileage warranty

For warranties and policies: https://www.thompsonmotorsports.net/warranties-and-policies.php  

***If, turbo, supercharged, or Stroker motor please add a High Pressure/High Volume oil pump for warranty"(if you do not add this pump for these application warranty will not be valid)***

*** CRATE AND ENGINE STAND REQUIRED FOR SHIPPING***

*A crate is not required for a customer pickup, only an engine stand*

*Gen III to Gen IV Short block conversion kit*

LS3 valley cover, gasket and bolt kit

LS3 front cover, gasket, bolt, sensor and harness kit

Cam and knock sensor extension harness

Timing set SELECT ONE (1X OR 4X)

Gen IV lifter buckets (Set of 4)

Call for any questions: 972-853-2450

We are located at: 

545 Justin Pl.

Nevada, TX

75173

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.