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Top quality LS - LT engine components, featuring brackets and various mounting hardware.

LS - LT Headquarters

At Classic Performance Products, we understand the popularity and performance benefits of LS and LT swaps in classic cars and trucks. That's why we've carefully curated a comprehensive range of LS - LT Conversion Products and Components ... to meet the diverse needs of enthusiasts and professionals alike. Whether you're undertaking a complete engine swap or just looking to upgrade specific aspects of your vehicle's engine setup, we have you covered. .

Our selection encompasses everything from LS Fit Rite Install Kits, designed to ensure an easy conversion, to specific component parts that guarantee compatibility and performance. Looking for an affordable entry point? Explore our LS Economy Install Kits. If it's the sound and efficiency you're after, our LS Exhaust systems and LS Fuel Tank Conversions provide just that.

Electrical setups can be complex, but our LS Electrical components make integration a breeze. Improve intake efficiency with our LS Intake Systems, or upgrade your aesthetic and functionality with LS Pulley Systems and LS Dress Up accessories. For those embracing the latest in GM engine technology, our LT Fuel Tank Conversions offer the compatibility your project demands.

Choose Classic Performance Products for your LS - LT Conversion needs and benefit from our extensive selection, ensuring your classic car or truck not only retains its timeless appeal but also performs at its peak with modern power.


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  1. PSI Vortec DBC w/ T56 Standalone Wiring Harness w/ LS3 Injectors

    1999-2006 Vortec with T56 and with LS3 Injectors

    Add to Compare Vendor Takes 10 Days to Ship
    Part # HAR-1093
    0%
    $549.00
  2. PSI Vortec DBW w/ 4L60E Standalone Wiring Harness w/ LS1 Injectors

    1999-2006 Vortec Chevy, GMC, Cadillac and Hummer Truck Engines with 4L60E with LS1 Injectors

    Add to Compare Vendor Takes 10 Days to Ship
    Part # HAR-1090
    0%
    $549.00
  3. 20 Gal Galvanized Steel Gas Tank for 1971-1972 Chevrolet El Camino/Sprint

    1971-1972 Chevrolet El Camino/Sprint Fuel Injection Gas Tank, Baffled, 20 Gallons

    Add to Compare Vendor Takes 7 Days to Ship
    Part # TM34K-T
    0%
    $295.00
  4. 20 Gal Fuel Injection Tank for a 1968-69 Chevy Chevelle

    1968-1969 Chevy Chevelle, Includes Tank & Straps

    Add to Compare Product Takes 3 Days to Ship
    Part # MS6869OGT-FI
    0%
    $382.00
  5. PSI Conversion LS Wiring Harness for 2005-2006 GM LS2 with 4L60E

    2005-2006 GM LS2 with 4L60E

    Add to Compare Vendor Takes 10 Days to Ship
    Part # HAR-1094
    0%
    $664.00
  6. Eddie Motorsport Valve Covers LS Fabricated Aluminum w/ Coil Mount Matte Black

    Valve Covers, Chevy LS, Fabricated aluminum, With coil mounts, Matte black Fusioncoat finish

    Add to Compare Vendor Takes 25 Days to Ship
    Part # EMS108-48MB
    0%
    $235.00
  7. PSI Gen IV Standalone Wiring Harness w/ 4L60E

    2008-2013 LS3 with 4L60E

    Add to Compare Vendor Takes 10 Days to Ship
    Part # HAR-1038
    0%
    $659.00
  8. PSI Wiring Harness w/ 4L60E

    2010-2013 L99 with 4L60E

    Add to Compare Vendor Takes 10 Days to Ship
    Part # HAR-1068
    0%
    $659.00
  9. 16 Gallon Fuel Injection Tank for a 1967-68 Ford Mustang

    1967-1968 Ford Mustang, Includes Tank, Hose & Filler Neck

    Add to Compare Product Takes 3 Days to Ship
    Part # MU6768OGT-FI
    0%
    $369.00
  10. Low A/C LS Engine Adjustable Mounting Plates, Polyurethane Pads (Low A/C Mount)

    2.25 Forward to 3.75 Forward (Used Mainly on Chevy Trucks, not useable on most cars), works with CP-1114G

    Add to Compare Product Takes 3 Days to Ship
    Part # LS-AK-LM
    0%
    $159.00
  11. 20 Gal Galvanized Steel Gas Tank for 1971-72 Chevy El Camino

    1971-72 Chevy El Camino EFI Fuel Tank Notched Corners, Baffled, 20 Gallons

    Add to Compare Vendor Takes 7 Days to Ship
    Part # TM34KN-T
    0%
    $339.00
  12. 15.5 Gallon Fuel Injection Tank for a 1955-56 Chevy Fullsize

    1955-1956 Chevy Fullsize, Includes Tank & Straps

    Add to Compare Product Takes 3 Days to Ship
    Part # FS5556OGT-FI
    0%
    $356.00
  13. PSI Gen IV Auto Transmission Wiring Harness 4L60E

    Auto Transmission with 4L60E

    Add to Compare Vendor Takes 10 Days to Ship
    Part # HAR-1036
    0%
    $659.00
  14. PSI Gen IV Standalone Wire Harness w/ T56/TR6060

    2006-2013 LS7 with T56/TR6060

    Add to Compare Vendor Takes 10 Days to Ship
    Part # HAR-1035
    0%
    $569.00
  15. 20 Gal Galvanized Steel Gas Tank for 1973-81 GM Truck

    1973-81 GM Truck Coated Steel EFI Gas Tank - 20 Gallon, Baffled

    Add to Compare In Stock
    Part # TM1A-T
    0%
    $319.00
  16. LS Engine Adjustable Mounting Plate Bracket Kit, Polyurethane Pads

    1/2" Rearwards to 3 1/2" Forward, Can be used with A/C Compressor in the upper Passenger position, or no A/C Compressor, with Polyurethane Pads

    Add to Compare In Stock
    Part # LS1-KU-P
    0%
    $159.00
  17. PSI DBC LT1/LT4 w/ T56 Standalone Wiring Harness

    1994-1995 Vortec LT1 or LT4 with T56

    Add to Compare Vendor Takes 10 Days to Ship
    Part # HAR-1006
    0%
    $519.00
  18. 20.5 Gal Galvanized Steel Gas Tank for 1970-73 Camaro / Firebird

    1970-73 Camaro / Firebird Fuel Injection Gas Tank, 20.5 Gallons, Baffled

    Add to Compare In Stock
    Part # TM42A-T
    0%
    $319.00
  19. 16 Gal Galvanized Steel Gas Tank for 64-68 Mustang w/ Rubber Hose and Fuel Injection Tray

    64-68 Mustang w/ Rubber Hose and Fuel Injection Tray, EFI Gas Tank, 16 Gallon, Baffled Carb and F.I.

    Add to Compare In Stock
    Part # MU-HT
    0%
    $289.00
  20. LT Engine Adjustable Mounting Plates

    1/2" Rearwards to 3 1/2" Forward, Can be used with A/C Compressor in the upper Passenger position, or no A/C Compressor, with Polyurethane Pads

    Add to Compare In Stock
    Part # LT1-KU
    0%
    $119.00
  21. 20 Gal Galvanized Steel Gas Tank for 1970 Chevrolet Monte Carlo

    1970 Chevrolet Monte Carlo Fuel Injection Tank, Baffled 20 Gallon

    Add to Compare Vendor Takes 7 Days to Ship
    Part # TM34F-T
    0%
    $295.00
  22. 18 Gal Galvanized Steel Gas Tank for 1967-68 Chevy Camaro/Firebird

    1967-68 Chevy Camaro/Firebird Coated Steel EFI Gas Tank, 18 Gallon, Baffled

    Add to Compare In Stock
    Part # TM32A-T
    0%
    $285.00
  23. 20 Gal Galvanized Steel Gas Tank for 1971-1972 Chevy Chevelles

    1971-1972 Chevy Chevelle EFI Fuel Tank - Notched Corners, Baffled, 20 Gallons

    Add to Compare Vendor Takes 7 Days to Ship
    Part # TM34UN-T
    0%
    $339.00
  24. 18 Gal Notched Galvanized Steel Gas Tank for 1967-68 Chevy Camaro/Firebird

    1967-68 Chevy Camaro/Firebird Notched Corner EFI Gas Tank, 18 Gallon, Baffled

    Add to Compare In Stock
    Part # TM32AN-T
    0%
    $339.00
  25. 20 Gal Galvanized Steel Gas Tank for 1956-62 Corvette

    1956-62 Corvette Fuel Injection Gas Tank, Baffled, 16 Gallons

    Add to Compare Vendor Takes 7 Days to Ship
    Part # TM45-T
    0%
    $319.00
  26. Universal Galvanized Steel Gas Tank w/ 3" Threaded Neck

    Universal Steel Fuel Tank with 3" Threaded Neck & Billet Cap

    Add to Compare Vendor Takes 7 Days to Ship
    Part # U9-A-T
    0%
    $309.00
  27. 18 Gal Galvanized Steel Gas Tank for 1963-72 Chevy Truck

    1963-72 Chevy Truck Frame Mount EFI Tank Bed Fill, 18 Gallon Baffled

    Add to Compare In Stock
    Part # TM6372-HT
    0%
    $329.00
  28. 20 Gal Galvanized Steel Gas Tank for 1968-69 Chevelle

    1968-69 Chevelle, Malibu and 1970 Buick Skylark, Notched, Baffled 20 Gallon

    Add to Compare Vendor Takes 7 Days to Ship
    Part # TM34BN-T
    0%
    $339.00
  29. 20 Gal Galvanized Steel Gas Tank for 1970-72 Olds Cutlass & 442s

    1970-72 Olds Cutlass & 442 EFI Fuel Tank - Notched Corners, Baffled, 20 Gallons

    Add to Compare Vendor Takes 7 Days to Ship
    Part # TM34RN-T
    0%
    $339.00
  30. 20 Gal Galvanized Steel Gas Tank for 1968-70 Chevrolet El Camino

    1968-70 Chevrolet El Camino EFI Fuel Tank - Notched Corner, Baffled, 20 Gallons

    Add to Compare Vendor Takes 7 Days to Ship
    Part # TM34JN-T
    0%
    $339.00
  31. 16 Gallon Fuel Injection Tank for a 1964-66 Ford Mustang

    1964-1966 Ford Mustang, Includes Tank, Hose & Filler Neck

    Add to Compare Product Takes 3 Days to Ship
    Part # MU6466OGT-FI
    0%
    $369.00
  32. 20 Gal Notched Gal Notchedvanized Steel Gas Tank for 1970 Buick Skylark

    1970 Buick Skylark, GS, Special EFI Tank - Notched Corners, 20 Gallons, Baffled

    Add to Compare Vendor Takes 7 Days to Ship
    Part # TM34LN-T
    0%
    $339.00
  33. 20 Gal Galvanized Steel Gas Tank for 1982-91 Chevy and GMC Pickup Truck

    1982-91 Chevy and GMC Pickup Truck, 20 Gallon Baffled F.I.

    Add to Compare In Stock
    Part # TM1B-T
    0%
    $319.00
  34. 20 Gal Galvanized Steel Gas Tank for 68 Pontiac GTO

    68 Pontiac GTO, Lemans & Tempest EFI Fuel Tank w/o Neck, Baffled 20 Gallon

    Add to Compare Vendor Takes 7 Days to Ship
    Part # TM34A-T
    0%
    $295.00
  35. 24 Gal Galvanized Steel Gas Tank for 1969-70 Chevy Impala

    1969-70 Chevy Impala EFI Gas Tank, 24 Gallon, Baffled

    Add to Compare Vendor Takes 7 Days to Ship
    Part # TM537B-T
    0%
    $315.00
  36. 24 Gal Galvanized Steel Gas Tank for 1964-67 Oldsmobile Cutlass

    1964-67 Oldsmobile Cutlass, 442 Fuel Injection Tank, Baffled, 24 Gallons

    Add to Compare Vendor Takes 7 Days to Ship
    Part # TM37G-T
    0%
    $315.00
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