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Holden V8 EFI 5.0L Alloy Super X Cylinder Heads(BARE)

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$3,696.00
$3,326.00
(You save $370.00 )
SKU:
ABH 5000-9SX
Weight:
12.00 KGS
Shipping:
$80.00 (Fixed Shipping Cost)
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yella-terra-logo-3d-thin.jpg

SuperX HEADS ARE HERE!

"600HP Out of the Box" "No Expensive CNC Porting Required"

VN STYLE EFI ALLOY CYLINDER HEADS

P/No. ABH 5000-9SX (Machined Injector Notches)

"Proudly Aussie Made for Aussie Cars!"

NOTE: Priced & Sold in pairs.

Using 50+ years knowledge and experience developing race-winning cylinder heads including GMH’s XU-1 and L34 programmes - we’ve produced the ULTIMATE injected Holden V8 alloy cylinder head ... Introducing the SuperX with inlet port cross ‘X’ section and volume 15% and 21% larger respectively than our legendary 5000-9 ... Contributing to a raw 600HP+ potential direct from the box to your block, with further scope for specialist porting.

Yella Terra SuperX cylinder heads are striclty designed for peak horsepower and torque applications on heavily modified carburettor and EFI Holden V8 253, 308, 304, 355 and 383 combinations.

Proudly designed and manufactured in Australia.

Notes:

Bare Super X Heads do NOT have valve seats fitted. Insert notch is machined undersize to cater for different valve & insert sizes. We recommend purchasing the Bare heads & consulting with your Engine Builder / Head machinist before purchasing valve seats.

Compare

  ABHA 5000-9 SuperX
CHAMBER FINISH Cast CNC
INLET PORT VOL. 168cc (wo/ notches) 204cc
INLET VALVE DIA. 2.020" 2.080"
INLET PORT HEIGHT 52.00 mm 56.00 mm
INLET PORT WIDTH 31.00 mm 33.00 mm
EXHAUST VALVE DIA. 1.600" 1.600"
EXHAUST PORT HEIGHT 35.50 mm 38.50 mm
EXHAUST PORT WIDTH 35.00 mm 37.00 mm
HP OUT-OF-BOX 520 hp 610 hp

 

CFM @28" H20

  Valve dia. .100" .200" .300" .400" .500" .600" .700" .800"
Factory 1.940" 58.0 124.0 165.6 190.0 205.3 220.0 NA NA
SuperX 2.080" 67.1 136.1 191.5 228.1 251.5 276.9 288.0 301.8

 

SuperX Tech Spec

MATERIAL AS 601, 356-T6 heat treated aluminium
MINIMUM HARDNESS 88hb
WEIGHT 12.7kg (assembled)
COMBUSTION CHAMBER VOL. 57cc (assembled)
INLET PORT VOL. 204cc (assembled)
INLET PORT DIMENSIONS 56.0mm high 33.0mm wide
EXHAUST PORT DIMENSIONS 38.5mm high 37.0mm wide
INLET VALVE SIZE Seats Not installed / Valves not included
INLET INSERT SIZE Seats Not installed / Valves not included
EXHAUST VALVE SIZE 1.600" min
EXHAUST INSERT SIZE 1.750" X .375"
SPARK PLUGS Thread 14x19mm (3/4") reach 5/8" hex tapered or flat seat
SPRING POCKETS 1.50" dia min - material thickness: .420"
INSTALLED HEIGHT 1.760" w/ standard length valves
VALVE ANGLE 5.1°
INLET VALVE POSITION Standard
INLET PORT POSITION Standard
EXHAUST VALVE POSITION Moved 2.0mm away from inlet
EXHAUST PORT POSITION Moved 2.0mm toward inlet
ROCKERS YT 6313 Platinum

yella-terra-logo-3d-thin.jpg

SuperX HEADS ARE HERE!

"600HP Out of the Box" "No Expensive CNC Porting Required"

VN STYLE EFI ALLOY CYLINDER HEADS

P/No. ABH 5000-9SX (Machined Injector Notches)

"Proudly Aussie Made for Aussie Cars!"

NOTE: Priced & Sold in pairs.

Using 50+ years knowledge and experience developing race-winning cylinder heads including GMH’s XU-1 and L34 programmes - we’ve produced the ULTIMATE injected Holden V8 alloy cylinder head ... Introducing the SuperX with inlet port cross ‘X’ section and volume 15% and 21% larger respectively than our legendary 5000-9 ... Contributing to a raw 600HP+ potential direct from the box to your block, with further scope for specialist porting.

Yella Terra SuperX cylinder heads are striclty designed for peak horsepower and torque applications on heavily modified carburettor and EFI Holden V8 253, 308, 304, 355 and 383 combinations.

Proudly designed and manufactured in Australia.

Notes:

Bare Super X Heads do NOT have valve seats fitted. Insert notch is machined undersize to cater for different valve & insert sizes. We recommend purchasing the Bare heads & consulting with your Engine Builder / Head machinist before purchasing valve seats.

Compare

  ABHA 5000-9 SuperX
CHAMBER FINISH Cast CNC
INLET PORT VOL. 168cc (wo/ notches) 204cc
INLET VALVE DIA. 2.020" 2.080"
INLET PORT HEIGHT 52.00 mm 56.00 mm
INLET PORT WIDTH 31.00 mm 33.00 mm
EXHAUST VALVE DIA. 1.600" 1.600"
EXHAUST PORT HEIGHT 35.50 mm 38.50 mm
EXHAUST PORT WIDTH 35.00 mm 37.00 mm
HP OUT-OF-BOX 520 hp 610 hp

 

CFM @28" H20

  Valve dia. .100" .200" .300" .400" .500" .600" .700" .800"
Factory 1.940" 58.0 124.0 165.6 190.0 205.3 220.0 NA NA
SuperX 2.080" 67.1 136.1 191.5 228.1 251.5 276.9 288.0 301.8

 

SuperX Tech Spec

MATERIAL AS 601, 356-T6 heat treated aluminium
MINIMUM HARDNESS 88hb
WEIGHT 12.7kg (assembled)
COMBUSTION CHAMBER VOL. 57cc (assembled)
INLET PORT VOL. 204cc (assembled)
INLET PORT DIMENSIONS 56.0mm high 33.0mm wide
EXHAUST PORT DIMENSIONS 38.5mm high 37.0mm wide
INLET VALVE SIZE Seats Not installed / Valves not included
INLET INSERT SIZE Seats Not installed / Valves not included
EXHAUST VALVE SIZE 1.600" min
EXHAUST INSERT SIZE 1.750" X .375"
SPARK PLUGS Thread 14x19mm (3/4") reach 5/8" hex tapered or flat seat
SPRING POCKETS 1.50" dia min - material thickness: .420"
INSTALLED HEIGHT 1.760" w/ standard length valves
VALVE ANGLE 5.1°
INLET VALVE POSITION Standard
INLET PORT POSITION Standard
EXHAUST VALVE POSITION Moved 2.0mm away from inlet
EXHAUST PORT POSITION Moved 2.0mm toward inlet
ROCKERS YT 6313 Platinum