Supra MK4 Precision 6466 Single Turbo Kit Install Guide
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Toyota Supra MK4
JZA80 (N/A)
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20-30 hours
Precision 6466 Gen2 Single Turbo Kit (T4 Divided)
Toyota Supra MK4 (JZA80)Also compatible with: JZA80 NA converted
Estimated Cost
$7,000-$9,300
Parts: $5,500-$6,800
Labor: $1,500-$2,500
Horsepower
+400-500 hp (700-800 whp on E85, 600-650 on 98 RON pump gas)
Torque
+300-400 lb-ft (peak 650+ lb-ft at 5,500 rpm)
Response
More lag than sequential stock (full boost ~4,800 rpm vs 3,500 stock)
Prerequisites
- • Compression test 140+ psi all cylinders
- • Leakdown under 10%
- • Fuel system fully upgraded (ID1050x + Walbro 460 minimum)
- • Standalone ECU installed and base-mapped
- • Clutch rated for 700+ lb-ft
Installation Progress0%
Installation Steps
1
Remove stock sequential turbo system completely
10 hours
Both CT12B turbos, all vacuum/boost lines, downpipes, charge piping, intercooler. Expect 10+ hours for clean removal
- • Sequential system is complex — photograph every vacuum connection
2
Install RSP T4 manifold
1.5 hours
3
Mount Precision 6466 to manifold
1 hour
4
Oil feed line routing
2 hours
5
Fabricate downpipe
3 hours (with welding)
6
Mount external wastegate to manifold
1 hour
7
Install HKS 600 intercooler
2 hours
8
Route intercooler piping (hot and cold side)
3 hours
9
Install BOV between turbo and intercooler
45 min
10
Reroute factory vacuum/boost references to manifold
1 hour
11
Initial start — base map
2 hours
12
Dyno tune — progressive boost
6-8 hours
Parts Required
All parts needed for this modification
Precision 6466 Gen2 CEA turbocharger
Quantity: 1 • $2,100
Real Street Performance T4 divided manifold (6-bolt)
Quantity: 1 • $1,200
Turbosmart Hypergate 45mm external wastegate
Quantity: 1 • $450
Tial 44mm BOV
Quantity: 1 • $180
Stainless steel V-band downpipe
Quantity: 1 • $420
HKS 600x300x76 front-mount intercooler
Quantity: 1 • $850
3.0-inch aluminum intercooler piping kit
Quantity: 1 • $320
ARP head studs (critical for E85)
Optional
Quantity: 1 • $380
Tools Required
Engine hoist
Rental: $50/day
Rental
Metric + imperial socket sets
Common
MIG welder (for downpipe trim)
Rental: $80/day
Rental
Die grinder
Rental: $25/day
Rental
Supporting Modifications
Additional mods recommended or required for optimal performance
ID1050x injectors
required
Stock 540cc inadequate for 600+ hp
Walbro 460 fuel pump
required
Stock pump 185 L/h insufficient
South Bend SFI twin disc clutch
required
Stock clutch slips above 450 lb-ft
Toyota 2JZ ARP head studs
recommended
Factory head gasket lifts above 20 psi E85
Oil catch can (Mishimoto)
recommended
Crankcase pressure venting critical at high hp
Tuning Requirements
ECU Flash Required
Dyno Tune Required
Estimated Tuning Cost
$1,500-$2,500
Haltech Elite 2500 or Motec M150 preferred. Map cold start carefully — larger turbo has different characteristics. E85 base map essential if running corn. Monitor EGT and knock continuously during initial pulls.
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