20 Best Ls To Turbo 350 Adapter [2024]

Are you looking for the best Ls To Turbo 350 Adapter? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling Ls To Turbo 350 Adapter.

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1 GM Gen III LS V8 Flexplate Adapter Kit to TH350/TH400/700R4 Transmission GM Gen III LS V8 Flexplate Adapter Kit to TH350/TH400/700R4 Transmission
2 for LS Swap Motor Mounts Adapter Plates LS Conversion Adjustable Universal Swap Bracket Small Block... for LS Swap Motor Mounts Adapter Plates LS Conversion Adjustable Universal Swap Bracket Small...
3 ICT Billet SBC Vehicle to LS Engine - Motor Mount Adapter Plate - Universal Swap Bracket Small Block... ICT Billet SBC Vehicle to LS Engine - Motor Mount Adapter Plate - Universal Swap Bracket Small...
4 ICT Billet - Transmission Adapter Fittings Front and Rear -6AN Flare to 1/4' NPSM TH350 TH400 4L60E... ICT Billet - Transmission Adapter Fittings Front and Rear -6AN Flare to 1/4" NPSM TH350 TH400...
5 NC Flexplate Adapter Spacer LS Swap Torque Stall Converter Hub Crankshaft Adapter Compatible with... NC Flexplate Adapter Spacer LS Swap Torque Stall Converter Hub Crankshaft Adapter Compatible with...
6 LOSTAR LS Adapter Flexplate With Bolts Kit LS1 TH400 TH350 700R4 Swap Flywheel SFI LOSTAR LS Adapter Flexplate With Bolts Kit LS1 TH400 TH350 700R4 Swap Flywheel SFI
7 LS/LT Crankshaft Hub Adapter for Torque Converter, Flexplate Spacer Sleeve, Stainless Steel... LS/LT Crankshaft Hub Adapter for Torque Converter, Flexplate Spacer Sleeve, Stainless Steel...
8 TASAN RACING LS1 Flexplate Adapter Spacer for TH350 TH400 Conversion Swap LS2 LS3 LQ4 LT1 LS7 5.7... TASAN RACING LS1 Flexplate Adapter Spacer for TH350 TH400 Conversion Swap LS2 LS3 LQ4 LT1 LS7 5.7...
9 ICT Billet LS Swap Torque Stall Converter Hub Adapter Transmission Crank Compatible With LS1 / LT1... ICT Billet LS Swap Torque Stall Converter Hub Adapter Transmission Crank Compatible With LS1 /...
10 EVIL ENERGY Fuel Filter Regulator 58 PSI Kit for LS Swap EFI Conversion EVIL ENERGY Fuel Filter Regulator 58 PSI Kit for LS Swap EFI Conversion
11 ICT Billet SBC Transmission to Engine Bolts Set Bell Housing Kit BBC Chevy 350 LT1 Trans Compatible... ICT Billet SBC Transmission to Engine Bolts Set Bell Housing Kit BBC Chevy 350 LT1 Trans...
12 Dewhel -6 AN Transmission Oil Cooler Adapter Fitting For GM Turbo 350 400 4L60E 200R 700R Dewhel -6 AN Transmission Oil Cooler Adapter Fitting For GM Turbo 350 400 4L60E 200R 700R
13 Gofotu Golf Shaft Adapter Sleeve .335 Tip Driver Fairway RH Compatible with Taylormade M1 M2 M3 M4... Gofotu Golf Shaft Adapter Sleeve .335 Tip Driver Fairway RH Compatible with Taylormade M1 M2 M3...
14 YHB Full Engine Mount Adapter Plates Urethane Swap Kit Compatible with GMC Sonoma S15 Chevrolet... YHB Full Engine Mount Adapter Plates Urethane Swap Kit Compatible with GMC Sonoma S15 Chevrolet...
15 Short Crank LS Transmission Adapter Flexplate Spacer Short Crank LS Transmission Adapter Flexplate Spacer
16 RULLINE Motor Mount Adapter Plate SBC Vehicle to LS Engine Universal Swap Bracket Small Block LS... RULLINE Motor Mount Adapter Plate SBC Vehicle to LS Engine Universal Swap Bracket Small Block LS...
17 ICT Billet LSA LS9 LT4 Supercharger MAP Vacuum Port Cap Plug Plate LS SC Blower ICT 551383 ICT Billet LSA LS9 LT4 Supercharger MAP Vacuum Port Cap Plug Plate LS SC Blower ICT 551383
18 ICT Billet Billet Aluminum TH400 Speedometer Plug Turbo 400 Chevy Transmission SBC 305 327 350 383... ICT Billet Billet Aluminum TH400 Speedometer Plug Turbo 400 Chevy Transmission SBC 305 327 350...
19 LS Crankshaft TH350/TH400/700R4 Torque Converter Adapter Sleeve LS Crankshaft TH350/TH400/700R4 Torque Converter Adapter Sleeve
20 ICT Billet LS Motor Plate Support Brace Kit Front Engine Solid Mount LSX LS1 LQ4 LS3 551169 ICT Billet LS Motor Plate Support Brace Kit Front Engine Solid Mount LSX LS1 LQ4 LS3 551169
SaleBestseller No. 1
GM Gen III LS V8 Flexplate Adapter Kit to TH350/TH400/700R4 Transmission
  • This kit includes the parts required to bolt a GM TH350, 700R4, 200-4R, or Powerglide transmission behind a Gen III LS engine
  • Includes flex plate, torque converter adapter sleeve, flex plate bolts, and torque converter bolts
  • Works with 10.75" and 11.066" (11.1") torque converter bolt patterns
  • Works with factory LS starter to reduce conversion costs
  • Flexplate is .035" thicker than stock which meets SFI 29.1 certification
Bestseller No. 2
for LS Swap Motor Mounts Adapter Plates LS Conversion Adjustable Universal Swap Bracket Small Block...
  • FUNCTION: Our brackets allow a LS series engine to be bolted into a vehicle which originally has a small block chevy engine with your existing mounts.
  • GREAT DESIGN: These are made with OEM specifications for the best possible fitment into your vehicle. They will move the crankshaft centerline up .17...
  • PACKAGE INCLUDES: 2 X Adapter Plates, 8 X Flat Head Bolts, and 6 X Flange M10-1.5 Bolts (The plates are M10 threaded, use the hardware included)
  • No Grinding Necessary for A Flush Fit: Our Swap motor mounts for LS have a necessary opening milled out of the center of the plate to clear the hump...
  • SUPERIOR MATERIAL: CNC milled from aluminum to provide the most accurate adapter plates available.
Bestseller No. 3
ICT Billet SBC Vehicle to LS Engine - Motor Mount Adapter Plate - Universal Swap Bracket Small Block...
  • Made with OEM specifications for the best possible fitment into your vehicle
  • These plates will move the crankshaft centerline up .17" in the vehicle
  • Made in Wichita, Kansas from aerospace grade, USA produced, 3/8" billet aluminum
  • Includes: 2 adapter plates, 8 flat head bolts, and 6 flange M10-1.5 bolts (plates are M10 threaded, use the hardware included)
  • Natural aluminum finish
Bestseller No. 4
ICT Billet - Transmission Adapter Fittings Front and Rear -6AN Flare to 1/4" NPSM TH350 TH400 4L60E...
  • Build your own custom -AN transmission lines with these -6AN fittings
  • Compatible with GM transmission case holes, up to 2007
  • Compatible with: TH350, TH400, 4L60E, 700R4, 200-4R, TR6060, Ford AOD 4R100, 4R70W, and C5 transmissions
  • Made in Wichita, Kansas from aerospace grade, USA produced, billet aluminum
  • Includes 2 fittings and orings
Bestseller No. 5
NC Flexplate Adapter Spacer LS Swap Torque Stall Converter Hub Crankshaft Adapter Compatible with...
  • Compatible with GM LS series Xtreme Duty Flexplate with a 4mm thick centerplate, to GM automatic transmission For 1998-2004 LS based engines using a...
  • Crankshaft adapter has good ductility, conduction and thermal conductivity, and has strong ferromagnetic. Stable characteristics, high reliability....
  • Crankshaft adapter sleeves allow you to bolt a GM automatic transmission to a engine or an older GM automatic transmission to an LS-series engine....
  • se of this ls flexplate adapter keeps from possibly damaging the input shaft of your transmission when doing a transmission swap. pilot bushing bore...
  • If you encounter any problems about LS flexplate adapter, you can feel free to contact us. We provide 24-hour mail service and will help you as soon...
Bestseller No. 6
LOSTAR LS Adapter Flexplate With Bolts Kit LS1 TH400 TH350 700R4 Swap Flywheel SFI
  • ✅Premium Quality, Direct Fit, 1-3 Days Delivery
  • ✅Notes: 1.For 1997-07 GM LS1/LS6 engines (up to '09 for LS2) and 4.8/5.3/6.0 truck engines including L33, L59, LM4, LM7, LQ4, LQ9, and LR4. Adapts...
  • ✅Enhance Performance. Easy Installation. High Reliability.
  • ✅Brand new with good performance
  • ✅1 Year Unlimited-mileage Quality Guarantee
Bestseller No. 7
LS/LT Crankshaft Hub Adapter for Torque Converter, Flexplate Spacer Sleeve, Stainless Steel...
  • (Specifics) While installing a Th350 or Th400 behind a LS engine while using a curved flywheel, this adapter spacer will come in handy.
  • (Compatibility) Compatible with GM Gen III/IV LS and Gen V LT series engines (except 1999-2000 6.0L does not require this.)
  • (Application) Adapts Powerglide, TH400, 4L80E, TH350, 2004R, 700R4, 4L60, 4L60E (from Non LS engine) torque converter snout to LS/LT
  • (Installation) Simply inserts into rear of crankshaft. If using a curved flexplate you'll need this adapter spacer.
  • (Dimension) Height: 1.02", Outer Diameter: 1.97", Inner Diameter 1.69"
Bestseller No. 8
TASAN RACING LS1 Flexplate Adapter Spacer for TH350 TH400 Conversion Swap LS2 LS3 LQ4 LT1 LS7 5.7...
  • LS1 Flexplate Adapter Spacer For GM TH350 TH400 Conversion Swap LS2 LS3 LS6 5.3 6.0 LS7
  • When Installing a TH350 or TH400 behind a LS Engine while Using a Curved Flywheel You'll Need this Adapter Spacer
  • The Spacer Will Center the Nose of the Converter to the Curved Flexplate
  • Package Include: 1 x Flexplate Adapter Spacer
  • For Use on 1998-04 LS1 Based Engines Using a TH350 or TH400 Transmission
Bestseller No. 9
ICT Billet LS Swap Torque Stall Converter Hub Adapter Transmission Crank Compatible With LS1 / LT1...
  • Adapts Powerglide, 4L80E, TH400, TH350, 700R4, 4L60, 4L60E (from non LS engine) torque converter snout to LS/LT engine
  • See our LS/LT Crankshaft and Flexplate guide to determine where to place your crankshaft hub adapter
  • Made in Wichita, Kansas from USA produced steel
  • Compatible with all LS and LT series engines Gen 3, 4, 5 (except 99-00' 6.0L does not require this)
  • Includes: 1 adapter ring (inserts into rear of crankshaft)
Bestseller No. 10
EVIL ENERGY Fuel Filter Regulator 58 PSI Kit for LS Swap EFI Conversion
  • Function: Fuel pressure regulator filter used to create a returnless fuel supply for LS engine swaps and electronic fuel injection conversions. This...
  • Feature: The fuel filter regulator with 6AN adpater fittings for LS Swap delivers 58 PSI (4 BAR) to your fuel rail and returns unused gas to the tank,...
  • Compatible with: The fuel filter pressure regulator compatible with Chevrolet 1999-2014 V8 5.3L/325 Chevy small block Gen III/IV (LS-based engines),...
  • Installation: fuel filter regulator kit for LS Swap EFI Conversion can be installed anywhere between the tank and the engine, although it is usually...
  • Package Included: 1pcs fuel filter/regulator, 1pcs 3/8'' EFI push on lock fitting for inlet, 1pcs 5/16'' EFI push on lock fitting for return, 1pcs 6AN...
Bestseller No. 11
ICT Billet SBC Transmission to Engine Bolts Set Bell Housing Kit BBC Chevy 350 LT1 Trans Compatible...
  • Includes 6pc (attaches transmission to engine)
  • Heavy duty, high strength, grade 10.9 bolts
  • Zinc coated for long lasting corrosion protection and prevents threads from seizing
  • No washers needed with these flanged headed JIS spec bolts
  • Set of 6 bolts
Bestseller No. 12
Dewhel -6 AN Transmission Oil Cooler Adapter Fitting For GM Turbo 350 400 4L60E 200R 700R
  • GM transmission cooler fittings-AN6-1/4NPS transmission cooler fittings
  • Material:Aluminium
  • -6 x 1/4NPS is the correct size for GM turbo 350, Turbo 400, 700R4, 4L60E and many other GM transmissions. These have a straight thread and seal on...
  • Package include: 2pcs oil cooler adapter ( one pair )
  • NOTES:: These are black anodized in color. Not for GM Powerglides.
Bestseller No. 13
Gofotu Golf Shaft Adapter Sleeve .335 Tip Driver Fairway RH Compatible with Taylormade M1 M2 M3 M4...
  • BRAND NEW | High-quality aftermarket golf shaft adapter / sleeve Fits .335 Shafts
  • Including ferrule, washer and screw, fitting .335 tip size shafts.
  • Comes with the Titanium Screw for M3 M4 M5 M6 SIM SIM2 but will also work with M1 - M2 - R15 If you are using your own Head Screw
  • Right Hand markings (still works with LH heads but markings are opposite)
  • SAME ADJUSTMENTS as the OEM (+/- 2°)
Bestseller No. 14
YHB Full Engine Mount Adapter Plates Urethane Swap Kit Compatible with GMC Sonoma S15 Chevrolet...
  • 🚗 Fit:1983-2005 GMC Sonoma,GMC S15,Chevrolet S10.Originally equipped with a 2.8l Chevrolet engine.see more detail in(Product description)
  • 🚗 1/4" laser cut steel multi position design for extreme durability.
  • 🚗 Includes: (x8) flange head engine mount bolts,(x2)motor mount bolts, washers & Hex nuts ,(x2)1/4" laser cut motor mount adapter plates,(x2)2.8L...
  • 🚗 Material:High quality steel constructions. Built to strict quality control standards. Instruction is not included.
  • 🚗 Recommended professional installation
Bestseller No. 15
Short Crank LS Transmission Adapter Flexplate Spacer
  • automotive-automatic-transmission-flexplates
Bestseller No. 16
RULLINE Motor Mount Adapter Plate SBC Vehicle to LS Engine Universal Swap Bracket Small Block LS...
  • 【LS Conversion】 These LS swap motor mounts will allow you to swap a 1997-2013 LSX style engine into any Chevy application that originally used 3...
  • 【LS Swap】—— The Chevy LS engine swaps into MOST 60's and 70's Chevy pickups and cars such as Camaro, Nova, Chevelle, and Impala among others
  • 【4 Adjustable Positions】The ls motor mount kit Machined 6061 billet aluminum,Designed to allow four positions in order to accommodate the widest...
  • 【Premium Quality】——Made of CNC Aluminum Alloy Material, they are precision-cut to provide a secure fit to the block and motor mount,These ls...
  • 【Include】2 pcs ls motor mount adapter, 8 flat head bolts, and 6 flange M10-1.5 bolts.
Bestseller No. 17
ICT Billet LSA LS9 LT4 Supercharger MAP Vacuum Port Cap Plug Plate LS SC Blower ICT 551383
  • Compatible with LSA, LS9, and LT4 superchargers
  • Can be used to plug 1 or both MAP sensor port locations
  • Billet plug securely seals MAP sensor bores
  • Includes: 1 plug, with FKM oring, and USA made bolt
  • Made in Wichita, Kansas from aerospace grade, USA produced, billet aluminum
Bestseller No. 18
ICT Billet Billet Aluminum TH400 Speedometer Plug Turbo 400 Chevy Transmission SBC 305 327 350 383...
  • Used for vehicles that do not require a speed sensor
  • Used with vehicles that use a GPS speedometer
  • This part is made to fit TH400 transmissions.
  • Made in Wichita, Kansas from aerospace grade, USA produced, billet aluminum
  • Includes plug, bolt, and orings
Bestseller No. 19
LS Crankshaft TH350/TH400/700R4 Torque Converter Adapter Sleeve
  • Compatible with GM LS series Xtreme Duty Flexplate with a 4mm thick centerplate
  • Premium steel construction, black painted finish
  • For TH350 or TH400 transmission application
  • Small end diameter 1.70", big end diameter 2.00"
  • Height 1.04", inside diameter 1.47"
Bestseller No. 20
ICT Billet LS Motor Plate Support Brace Kit Front Engine Solid Mount LSX LS1 LQ4 LS3 551169
  • GM LS
  • Kit includes 1 upper brace, 1 lower brace, and 7 mounting bolts
  • A must have for high horsepower engines
  • These braces bolt onto the passenger side of the block
  • Direct fit with all ICT Billet brand LS engine plates

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FAQ:

Q: What size Turbo should you choose for your LS engine?

A: With an LS-based engine, the range of turbos you have to choose from is going to be different than other engines based on how the mill functions. “We typically don’t go any smaller than a 75mm turbine wheel setup on any LS platform for efficiency reasons.

Q: What engines can be installed behind LS engines?

A: Adapts all of these engines to TH350, 700R-4, 200-4R, 4L60 and Powerglide transmissions that originally came behind a non-LS engine (such as a SBC or BBC V8). If you’re installing a TH350 or 700R4 behind an LS engine, we recommend the use of adapter sleeve 57518346 which centers the torque converter hub into the LS crankshaft.

Q: Is it possible to convert an LS engine to th350/th400?

A: Adapting an LS engine to a TH350/TH400 is not only possible, but quite easy to do. Read more to see how with lots of pics! I want to clear up some confusion here. I did A LOT of research on bolting the newer LS motor to the older style TH400 transmission during my swap, most of which just confused me even more.

Q: What kind of torque converter do I need for a TH350?

A: The kit designed to fit the TH350 or 700R automatic transmission is PN712500A; and for the TH400 transmission PN712500A4. These kits include a modified flexplate (drilled for a early GM torque converter), flexplate bolts, crank spacer bushing.