• Thompson Motorsports "The Boost King"

Forged 346/383CI all forged iron block motor STAGE 3

Blueprinted GM block LM7 or Gen 4 5.3 core

King main bearings

King rod bearings

Thompson Motorsports single piece racing cam bearings

K1 forged crankshaft with reluctor 3.622" or 4.000"

Manley H-Heavy 4340 forged connecting rods with ARP 2000 rod bolts

Diamond shelf piston with GFX file fit rings

Steel ring set

This short block is rated to 900HP (1100HP with ARP main stud upgrade)

Dart 225 as cast cylinder heads

Stainless steel intake and exhaust valves

PAC 1219 spring kit 

Thompson Motorsports custom ground Camshaft

Thompson Motorsports custom length Chromoly pushrods

Stock replacement bolts

Melling Select High pressure oil pump 

Billet adjustable timing set

Thompson Motorsports high RPM lifter set 

Trunion Upgraded Rockers 

GM MLS head gaskets

GM lifter trays

Thompson motorsports Professional assembly and 12 month unlimited mileage warranty

(ARP MAIN STUD AND HEAD STUD UPGRADE AVAILABLE)



PLEASE NOTE THAT THERE IS A 4-6 WEEK BUILD TIME FROM THE DATE OF PAYMENT.


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Thompson Motorsports "The Boost King"

  • Product Code: A4-13
  • Availability: 998
  • $7,548.00


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Tags: Motor of the month, iron long block, long block, iron