Supra MK4 South Bend SFI Twin Disc Clutch Install
Supra MK4 South Bend Twin Disc Install
Legal in 0
Toyota Supra MK4
JZA80 (N/A)
Power
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0-60
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Top Speed
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Current Market Value
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🇺🇸 US Import Information
This vehicle will become legal to import in 0 under the 25-year exemption rule. Check our import guide for details on the process.
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10-14 hours
South Bend Clutch TDDMAXYS-ORG SFI Twin Disc
Toyota Supra MK4 (JZA80)
Estimated Cost
$2,800-$3,700
Parts: $1,800-$2,200
Labor: $1,000-$1,500
Horsepower
0
Torque
Enables transmission of 900+ lb-ft (stock clutch slips at 450 lb-ft)
Response
Firm pedal, positive engagement, ideal for drag strip launches
Prerequisites
- • Transmission jack or two-person transmission drop
- • Clutch alignment tool
- • Flywheel bolts (new)
- • Pilot bearing installer
Installation Progress0%
Installation Steps
1
Remove driveshaft
45 min
Mark flange alignment, unbolt 4 bolts at differential flange, slide forward off transmission
2
Disconnect shifter linkage
15 min
3
Disconnect reverse and neutral switches
10 min
4
Support engine with stand
20 min
5
Remove V160 crossmember (4 bolts)
20 min
6
Remove transmission bellhousing bolts (8)
45 min
7
Slide transmission back, lower onto jack
30 min
8
Remove stock clutch and flywheel
30 min
9
Inspect crankshaft for damage or heat marks
10 min
10
Remove pilot bearing, install new
20 min
11
Install lightweight flywheel with ARP bolts
30 min
12
Install twin disc clutch assembly
45 min
13
Torque pressure plate bolts in sequence
20 min
14
Reinstall transmission
2 hours
15
Refill transmission fluid and bleed clutch
30 min
Parts Required
All parts needed for this modification
South Bend TDDMAXYS-ORG twin disc clutch
Quantity: 1 • $1,550
Lightweight steel flywheel (10 lbs vs stock 18 lbs)
Quantity: 1 • $420
ARP flywheel bolts (8)
Quantity: 1 • $45
Pilot bearing (OEM Toyota)
Quantity: 1 • $25
Throwout bearing (South Bend supplied)
Quantity: 1 • $60
Tools Required
Transmission jack
Rental: $30/day
Rental
Clutch alignment tool
Common
Flywheel holding tool
Rental: $15/day
Rental
Pilot bearing puller/installer
Rental: $15/day
Rental
Supporting Modifications
Additional mods recommended or required for optimal performance
Clutch master cylinder upgrade
recommended
Stock master is undersized for twin disc pressure
Braided clutch line
optional
Removes pedal sponginess
ACT flywheel bolt upgrade
optional
Higher grade bolts
Tuning Requirements
ECU Flash Required
Dyno Tune Required
Estimated Tuning Cost
$0
500 mile break-in at moderate engagement required. No aggressive launches first 500 miles. Clutch noise at idle is normal for twin disc — not a defect.
Disclosure: We may earn a commission from purchases made through affiliate links on this page. This helps support our comprehensive modification guides. See our full disclosure policy.