5.8L ALUMINUM SHORT BLOCK (LM354S)

Sale price $13,699.00 Regular price $15,000.00

L&M Engines LM354S 5.8L Aluminum Short Block

Our LM354S short block package represents the culmination of our results driven design and race proven performance. The LM354S short block is built to be bulletproof under extreme conditions and meet the requirements of today’s racer. We are also mindful that many of our customers are not building full blown racecars and will routinely run their engines on the street under typical street conditions … final application is always important. The LM354S has been shown by our customers to hold up to and above 1500RWHP.

Options: Choose Non-Sleeved or Sleeved Block for extra durability

The Build

Block Ford 5.8L Aluminum Block
Crankshaft 5.4L Cobra Jet Steel Crankshaft
Pistons LM880 Custom Pistons (9.5:1 CR, other compression ratios available)
Rods Manley Pro I Beam Billet Rods
Rings Total Seal Steel Rings for GT500 Plasma Bore
Rod Bearings King Engine XPN Series
Main Bearings King Engine HP Series
Fasteners ARP ARP main studs and side bolts
Oil Pump Cobra Jet Housing w/ TSS Billet Oil Pump Gears

New 5.8L GT500 Aluminum Block

All new builds include a new Ford 5.8L GT500 aluminum engine block as used in the new GT500s directly from Ford.

If you would like to reuse your old block, please call or email us to obtain an updated quote since pricing will differ when using customer supplied engine components.


New 5.4L Cobra Jet Steel Crankshaft

New 5.4L Cobra Jet steel crankshaft. We have found the Cobra Jet crankshafts to be one of the strongest crankshafts available for this application with extensive race proven reliability. Double keyed by us as a standard feature (Can still be used with single key dampers).


Super Cobra Jet Oil Pump Housing with Triangle Speed Shop Billet Oil Pump Gears

Super cobra jet oil pump housings upgraded with Triangle Speed Shop billet oil pump gears is now standard on all our of our short block offerings.


L&M Engines Custom Series Pistons

The stock pistons are a weak spot in the modular engine design. Our custom pistons retain the beneficial features while significantly improving the overall design.

  • Designed in house by L&M Engines and Manufactured by Diamond Pistons
  • Ceramic coated piston domes
  • .300” thick piston domes
  • .300” down ring
  • .130”+ skirts
  • Teflon coated skirts

Manley Pro I Beam Billet Rods

Manley Pro I beam billet connecting rods.


King Engine Rod and Main Bearings

  • King Rod Bearings XPN Series
  • King Main Bearings HP Series

Full Race Engine Prep

Every engine gets the full race preparation whether it’s destined for the street or the track.

  • Measure main bearing bores and alignment
  • Install honing stress plates to measure plasma spray cylinders for size and fit
  • Wash block for assembly
  • Install pistons on rods with locks and check clearances
  • Digitally balanced crankshaft
  • Polish crankshaft and check journal dimensions
  • Wash crankshaft for assembly
  • Precision file end gaps of piston rings for required application
  • Measure main & rod clearances, selective fit bearings for proper oil clearance, install bearings
  • Assemble Ford Modular engine to short block configuration
  • Review all dimensions & clearances
  • Final QA and inspection

Engine Block Exchange Policy