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McLeod 4952-00-07 Soft Lok Clutch Kit Mopar 340/383/440 10.5" 6-Bolt 143T

(Chrysler 300 1964-71, Town & Country 1970-77, Newport 1965-78, New Yorker 1970-78, Imperial 1966-67, 1970-75; Dodge Charger 1966-74 + 53 more models)

Manufacturer

Picture for manufacturer McLeod

Part Number

4952-00-07
8 reviews
Sale Price

$1,850.00

Estimated ship date Sunday, November 15

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Product Details

The McLeod 4952-00-07 Soft Lok is a competition-grade clutch assembly engineered for Mopar big and small block engines, including 340, 383, and 440 cubic inch applications with a 6-bolt crankshaft. Featuring a 10.5-inch diameter, 1-1/8-inch x 26-spline input shaft, and 143-tooth aluminum flywheel, this assembly is purpose-built for drag racing performance.

The Soft Lok is one of McLeod's most widely used drag racing clutch systems, with a proven record as an NHRA and IHRA record holder. Its design delivers low static clamp load for a light pedal effort and smooth, controlled clutch engagement — allowing the vehicle to leave the starting line more aggressively with reduced tire spin.

Key Features:

  • Competition drag racing clutch — not recommended for street use
  • Low static pressure for light pedal feel and soft engagement
  • Adjustable spring pressure for tunable launch characteristics
  • Available with counterweights for rotating assembly balance
  • 0-balance aluminum flywheel (6-bolt crankshaft pattern)
  • Sintered iron friction disc for aggressive, consistent grip
  • NHRA and IHRA record-holding design
  • Fits Mopar 340, 383, and 440 engines (1964–1978)

Kit Includes:

  • Pressure plate assembly
  • Sintered iron clutch disc
  • Aluminum flywheel (143-tooth, 0 balance)

The McLeod Soft Lok 4952-00-07 delivers the race-proven reliability and tunability that serious Mopar drag racers demand, combining lightweight aluminum construction with precise spring pressure adjustment for a consistent, repeatable launch every pass.

Products specifications

Fits

Chrysler 300 1964-71, Town & Country 1970-77, Newport 1965-78, New Yorker 1970-78, Imperial 1966-67, 1970-75; Dodge Charger 1966-74, Challenger 1970-73, Dart 1967-73, Ramcharger 1974-78, D150 1978, W150 1978, Coronet 1965-67, 1970-76 + 47 more models

Flywheel Material

Aluminum

Disc Diameter

10.5"

Engine

1964-1999 SBC/BBC

Engine Balance

Internal Balance

Ring Gear

143 tooth

Hub Style

Solid

magento _type

simple

Magento category

Clutch Kits

magento status

1

magento tax_class_id

2

magento visibility

3

magento_atrribute_set

Clutch Kits

magento_product_web

base

magento_store

default

Make

Chrysler

Number of Discs

Single

Racing Application

Drag Racing

Spline

1 1/8" x 26

Disc Diameter

10.5In.

Flywheel Included

Yes

Spline

1 1/8In. x 26

Quantity

Sold as a kit.

Counterweight Assist

Yes

Flywheel Material

Billet aluminum

Clutch Usage

Performance

Input Spline Quantity

26

Pilot Bushing Included

No

Engine Balance

Internal

Pressure Plate Style

Long

Disc Style

Full Face

Alignment Tool Included

Yes

Disc Material

Sintered iron

Ring Gear Tooth Quantity

143-tooth

Throwout Bearing Included

No

Make

MOPAR

Hardware Included

Yes

Like the simplicity so far. Ordered my product on Sunday shipped out Tuesday so we'll see how fast and efficient shipping is.

very hard to find parts. was very happy you had them.you won my business.thanks

Autoplicity had the lowest price I found on the product I wanted. Also, the item was shipped very quickly. I received 2 days after I purchased it. Great service!

had the brand i was looking for and at a really good price

Great Place to shop for Auto Parts Very Fast shipping

I am extremely happy with Autoplicity from start to finish! They had the best prices online on Hawk Performance pads and were shipped the day I ordered. They were at my door step within two days of me ordering them! You can't beat that anywhere. Cheaper and faster, it truely dosen't get any better than that.

Comparable pricing, fast trackable shipping.

Great prices, and much faster delivery than expected. They "over-delivered" on what they said they'd do. Will definitely use them again!

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