Cylinder Heads: Standard & modified for unleaded fuel & performance use

Cylinder Heads: Standard & modified for unleaded fuel & performance use
We recommend three basic stages of cylinder head modification for the MGA.

Stage 1: MGA99 or MGA99LF (unleaded) for fast road use modified, and gas flowed, fitted with
1.5625” inlet Valves and 1.344” exhaust valves.

Stage 2: MGA100 or MGA100UNLD (unleaded), for rally use, modified, polished and fully gas
flowed to a higher specification than the fast road head. Fitted with either 1.5625” or 1.625” inlet
valves and 1.344” exhaust valves depending on engine capacity.

Stage3: MGA101 or MGA101UNLD (unleaded), for race use, the ultimate “state of the art” fully
modified, polished and gas flowed head. Fitted with 1.5625” or 1.625” inlet valves and 1.344”
exhaust valves depending on engine capacity and the camshaft used. For large bore full race
engines with an MGA321 camshaft 1.69” inlet and 1.44” exhaust valves can be used. Bronze
valve guides are fitted.

All heads are supplied fully assembled with suitable valve springs, ready to fit to your engine.

Cylinder Heads: Standard & modified for unleaded fuel & performance use

Item

Description

Action

CYLINDER HEAD MGA 1622

Product Code: 12H1669

MGA 1622

Has been superseded by

MGA 1622 RECON HEAD LEAD FREE - C.O.U.

Product Code: 48G215UNLD

£566.40

£472.00 ex. VAT

each x

MGA 1622 RECON HEAD

Product Code: 48G215E

MGA1622

£1,005.00

£837.50 ex. VAT

each x

MGA 1622 RECON HEAD LEAD FREE - C.O.U.

Product Code: 48G215UNLD

MGA1622

£566.40

£472.00 ex. VAT

each x

USE 48G31AUNLD

Product Code: 48G31

MGA 1500 & 1600

Has been superseded by

L/FREE HEAD STD VALVES/GUIDES C.O.U

Product Code: 48G31AUNLD

£1,164.00

£970.00 ex. VAT

each x

L/FREE HEAD STD VALVES/GUIDES C.O.U

Product Code: 48G31AUNLD

MGA 1500 & 1600

£1,164.00

£970.00 ex. VAT

each x

L/FREE HEAD MGA 21/4 & BRZ GDS C.O.U.

Product Code: 48G31BUNLD

MGA 1500 & 1600

£514.80

£429.00 ex. VAT

each x

Valve guide Inlet (cast) MGA-MGB

Product Code: 12H2222

£3.54

£2.95 ex. VAT

each x

Valve guide Exhaust(cast) MGA/B (inlet/ex MGC)

Product Code: 12B1339

£3.54

£2.95 ex. VAT

each x

PLUG ROCKER OIL FEED HOLE

Product Code: 6K872

£0.31

£0.26 ex. VAT

each x

STUD ROCKER ASSY SHORT MGB A

Product Code: 51K881

£3.47

£2.89 ex. VAT

each x

STUD ROCKER ASSY SHORT MGB A

Product Code: 51K881

£3.47

£2.89 ex. VAT

each x

STUD ROCKER ASSY LONG MGB MGA

Product Code: 51K893

£3.02

£2.52 ex. VAT

each x

STUD ROCKER ASSY LONG MGB MGA

Product Code: 51K893

£3.02

£2.52 ex. VAT

each x

STUD 5/16 INCH UNF/UNC X 1.7/8 INCH

Product Code: CHS2515

£1.36

£1.13 ex. VAT

each x

Inlet valve MGA-MGB 1.562 inch

Product Code: 12H435

MGA 1622

£7.14

£5.95 ex. VAT

each x

INLET VALVE MGA 1500/1600

Product Code: 1H1059

MGA 1500 & 1600

£7.62

£6.35 ex. VAT

each x

Exhaust valve MGA MGB 1.344 inch

Product Code: 12H436

MGA 1622

£8.34

£6.95 ex. VAT

each x

Exhaust valve 214N MGA 1500/1600

Product Code: 1H1323

MGA 1500 & 1600

£6.90

£5.75 ex. VAT

each x

OUTER VALVE SPG MGA EARLY MGB

Product Code: 12H1679

Rally use - use with 12H176 inner

£2.04

£1.70 ex. VAT

each x

VALVE SPRING SET(DOUBLES) A B

Product Code: 12H1679C

£19.68

£16.40 ex. VAT

SET x

INNER VALVE SPG MGA EARLY MGB

Product Code: 12H176

Quantity 8

£2.60

£2.17 ex. VAT

each x

COLLAR VALVE SPRING MGB MGA

Product Code: 1H1321

£2.88

£2.40 ex. VAT

each x

VALVE GUIDE SHROUD LATE A & B

Product Code: 1H1320

£8.20

£6.83 ex. VAT

each x

COLLAR VALVE SPRING - TOP

Product Code: 12H992

£2.38

£1.98 ex. VAT

each x

VALVE STEM OIL 'O' RING

Product Code: AEK113

£0.25

£0.21 ex. VAT

each x

VALVE COTTER SET (2 PIECES)

Product Code: 1K800

£6.10

£5.08 ex. VAT

PAIR x

CIRCLIP VALVE COLLET MGB MGA

Product Code: 1K372

£0.79

£0.66 ex. VAT

each x

STUD M/FOLD 5/16 INCH UNF x 1.5/8 INCH

Product Code: FHS2513

£1.33

£1.11 ex. VAT

each x

STUD M/FOLD 5/16 INCH UNF x 1.7/8 INCH

Product Code: FHS2515

£1.68

£1.40 ex. VAT

each x

MANIFOLD GASKET MGA MGB

Product Code: GEG602

£3.30

£2.75 ex. VAT

each x

MGB-MGA Rocker shaft

Product Code: 11G62

£17.94

£14.95 ex. VAT

each x

SPLIT PIN 3/32 INCH x 1.5 INCH (PACK 10)

Product Code: GHF502

£0.14

£0.12 ex. VAT

Pack of 10 x

RIVET - NLA

Product Code: 5C2436

ROCKER PILLAR CENTRE OIL FEED

Product Code: 12H389

£13.80

£11.50 ex. VAT

each x

ROCKER PILLAR PLAIN

Product Code: 12H390

SPRING OIL PICKUP MID MGB MGA

Product Code: 6K871

£0.48

£0.40 ex. VAT

each x

MGA MGB New rocker arms

Product Code: 12H3377

Quantity 8

£15.48

£12.90 ex. VAT

each x

MGB-A Rebuit rocker assy (In-line oil feed)

Product Code: 12H3377A

£143.94

£119.95 ex. VAT

each x

MGB-A Rebuilt rocker assy (off set oil feed)

Product Code: 12H3377OS

£143.94

£119.95 ex. VAT

each x

BUSH ROCKER SHAFT MGB MGA

Product Code: 1G2295

Needs reaming after fitting

£1.92

£1.60 ex. VAT

each x

TAPPET ADJ SCREW MGA/B/C MID

Product Code: 12H3376

Latest type - no oil hole

£1.50

£1.25 ex. VAT

each x

LOCKNUT ROCKER SCREW

Product Code: 51K1178

£0.50

£0.42 ex. VAT

each x

SCREW ROCKER PILLAR MID MGA

Product Code: 2A258

£1.92

£1.60 ex. VAT

each x

PLATE R/PILLAR MID 1275 MGA

Product Code: 2A259

£4.73

£3.94 ex. VAT

each x

WASHER DOUBLE COIL - NLA

Product Code: 1A2139

WASHER PLAIN 5/8 INCH x1.1/8 INCH OD

Product Code: PWZ110

£0.66

£0.55 ex. VAT

each x

WASHER - PLAIN 5/16 INCH (PACK 10)

Product Code: GHF301

£0.07

£0.06 ex. VAT

Pack of 10 x

S/STEEL PLAIN WASHER 5/16 INCH

Product Code: GHF301SS

£0.18

£0.15 ex. VAT

each x

SPRING WASHER 5/16 inch

Product Code: GHF332

£0.07

£0.06 ex. VAT

Pack of 10 x

S/STEEL SPRING WASHER 5/16 INCH

Product Code: GHF332SS

£0.12

£0.10 ex. VAT

each x

SPRING WASHER 5/16 inch

Product Code: GHF332

£0.07

£0.06 ex. VAT

Pack of 10 x

S/STEEL SPRING WASHER 5/16 INCH

Product Code: GHF332SS

£0.12

£0.10 ex. VAT

each x

NUT 5/16 INCH UNF HIGH TENSILE

Product Code: FNZ505

£0.59

£0.49 ex. VAT

each x

NUT 5/16 INCH UNF HIGH TENSILE

Product Code: FNZ505

£0.59

£0.49 ex. VAT

each x

HEAD GASKET MGA 1600

Product Code: GEG303

£15.26

£12.72 ex. VAT

each x

Head gasket set MGA

Product Code: GEG104

£25.74

£21.45 ex. VAT

each x

CYLINDER HEAD SET MGA REPRO

Product Code: GEG104Z

£16.93

£14.11 ex. VAT

SET x

HEAD WASHER MGB MIDGET MGA

Product Code: 12H2178

£0.66

£0.55 ex. VAT

each x

NUT CYLINDER HEAD MGB MID MGA

Product Code: 51K1193

£1.14

£0.95 ex. VAT

each x

Blanking Plate heater valve MGB

Product Code: 1G1282

£10.49

£8.74 ex. VAT

each x

HEATER TAP GASKET MGA MGB MID

Product Code: 12H3868

£0.62

£0.52 ex. VAT

each x

SCREW 1/4 INCH UNF x 0.5 INCH

Product Code: SH604041

£0.16

£0.13 ex. VAT

each x

SPRING WASHER 1/4 INCH (PACK 10)

Product Code: GHF331

£0.10

£0.08 ex. VAT

Pack of 10 x

SPRING WASHER 1/4 INCH (PACK 10)

Product Code: GHF331

£0.10

£0.08 ex. VAT

Pack of 10 x

S/STEEL SPRING WASHER 1/4 INCH (RECT)

Product Code: GHF331SS

£0.12

£0.10 ex. VAT

each x

PLUG - NLA

Product Code: 1G2953

WASHER REVERSE SWITCH

Product Code: 1B3664

£0.73

£0.61 ex. VAT

each x

SPARK PLUG MGB MID 1275 MGA TD/F

Product Code: NGKBP6ES

£3.82

£3.18 ex. VAT

each x

USE GTS102

Product Code: 11K399

Has been superseded by

Thermostat 74C MGAMGBMidget and MG TF

Product Code: GTS102

£5.27

£4.39 ex. VAT

each x

Thermostat 74C MGAMGBMidget and MG TF

Product Code: GTS102

£5.27

£4.39 ex. VAT

each x

SMITHS THERMOSTAT

Product Code: 11G292

Has been superseded by

Thermostat 82C MGAMGBV8Midget and MG TF

Product Code: GTS104

£5.70

£4.75 ex. VAT

each x

Thermostat 74C MGAMGBMidget and MG TF

Product Code: GTS102

£5.27

£4.39 ex. VAT

each x

Thermostat 82C MGAMGBV8Midget and MG TF

Product Code: GTS104

£5.70

£4.75 ex. VAT

each x

THERMOSTAT 88c MGAMGBMidget and MG TF

Product Code: GTS106

Competition use

£6.49

£5.41 ex. VAT

each x

THERMOSTAT BLANKING SLEEVE

Product Code: AJJ4012

Used with no thermostat

£10.51

£8.76 ex. VAT

each x

THERMOSTAT HOUSING MGB MGA

Product Code: 12H797

£17.34

£14.45 ex. VAT

each x

Thermostat housing gasket

Product Code: GTG101

£0.61

£0.51 ex. VAT

each x

WASHER - PLAIN 5/16 INCH (PACK 10)

Product Code: GHF301

£0.07

£0.06 ex. VAT

Pack of 10 x

S/STEEL PLAIN WASHER 5/16 INCH

Product Code: GHF301SS

£0.18

£0.15 ex. VAT

each x

NUT 5/16 inch UNF (PACK 10)

Product Code: GHF201

£0.18

£0.15 ex. VAT

Pack of 10 x

S/STEEL NUT 5/16 INCH UNF

Product Code: GHF201SS

£0.20

£0.17 ex. VAT

each x

S/HAND MGA ORIGINAL ROCKER CVR

Product Code: 1H1339U

£24.00

£20.00 ex. VAT

each x

SOLID RIVET FOR ROCKER COVER PLATES

Product Code: GRV105

£0.54

£0.45 ex. VAT

each x

OIL FILLER CAP MGA MGB

Product Code: 8G612

£9.78

£8.15 ex. VAT

each x

OIL FILLER CAP CHROME PLATED

Product Code: 8G612CP

£11.94

£9.95 ex. VAT

each x

ROCKER COVER GASKET MGA MGB

Product Code: AJM402

£2.34

£1.95 ex. VAT

each x

SEAL ROCKER COVER MGB MID MGA

Product Code: 12A1358

£0.62

£0.52 ex. VAT

each x

CUP WASHER R/COVER MGB MID A

Product Code: 1A2156

£1.09

£0.91 ex. VAT

each x

RETAINING NUT ROCKER COVER

Product Code: 2A150

£2.28

£1.90 ex. VAT

each x

NUT Rocker COVER CHROME

Product Code: 2A150CP

£4.26

£3.55 ex. VAT

each x

DISTANCE PIECE R/COVER

Product Code: 1B2925

£1.55

£1.29 ex. VAT

each x

BRACKET ENGINE LIFT

Product Code: 12A1968

£5.50

£4.58 ex. VAT

each x

WESLAKE PLATE

Product Code: BGS1001

£5.94

£4.95 ex. VAT

each x

MG ROCKER COVER PLATE

Product Code: BGS1005

£5.94

£4.95 ex. VAT

each x

ALLOY ROCKER COVER MGB MGA

Product Code: GAC1010

£49.38

£41.15 ex. VAT

each x

USE 2A150ACP

Product Code: 2A150A

Has been superseded by

CHROME NUT ALLOY ROCKER COVER

Product Code: 2A150ACP

£5.46

£4.55 ex. VAT

each x

CHROME NUT ALLOY ROCKER COVER

Product Code: 2A150ACP

£5.46

£4.55 ex. VAT

each x

INLET VALVE 1.69 INCH

Product Code: AEH860

Has been superseded by

MGB Inlet valve 1.69 stainless steel (Race)

Product Code: AFD1

£20.34

£16.95 ex. VAT

each x

MGB Inlet valve 1.69 stainless steel (Race)

Product Code: AFD1

£20.34

£16.95 ex. VAT

each x

Inlet valve 1.5625 Tuning

Product Code: AFD2

£10.50

£8.75 ex. VAT

each x

EXHAUST VALVE 1.44 INCH

Product Code: AEH861

£19.80

£16.50 ex. VAT

each x

MGB Exhaust valve 1.34 stainless steel (Race)

Product Code: AFD3

£20.34

£16.95 ex. VAT

each x

CAP VALVE SPRING KIT MGB MGA

Product Code: 12H3309KIT

Has been superseded by

Cap competition valve spring SET of 8

Product Code: CVS1001CAP

£104.88

£87.40 ex. VAT

SET x

VALVE COTTER *EACH* MGB/C

Product Code: 12H2117

£1.36

£1.13 ex. VAT

each x

Bronze inlet valve guide MGA-MGB

Product Code: AEH755

£8.34

£6.95 ex. VAT

each x

Bronze valve guide MGB-MGA-(MGC inlet/Ex)

Product Code: AEH756

£8.34

£6.95 ex. VAT

each x

OUTER VALVE SPG MGA EARLY MGB

Product Code: 12H1679

Quantity 8 - use with 12H176

£2.04

£1.70 ex. VAT

each x

VALVE SPRING SET(DOUBLES) A B

Product Code: 12H1679C

£19.68

£16.40 ex. VAT

SET x

USE 12H1679C

Product Code: 1H1111

Has been superseded by

VALVE SPRING SET(DOUBLES) A B

Product Code: 12H1679C

£19.68

£16.40 ex. VAT

SET x

INNER VALVE SPG MGA EARLY MGB

Product Code: 12H176

Use with 12H1679 outer

£2.60

£2.17 ex. VAT

each x

MGA/B Comp valve spring set

Product Code: CVS1001

Race/Rally use only

£95.94

£79.95 ex. VAT

SET x

VALVE STEM OIL SEALS

Product Code: KG537

£0.90

£0.75 ex. VAT

each x

Insert inlet valve unleaded 1.562 inch

Product Code: 12H4423

£11.34

£9.45 ex. VAT

each x

INSERT EXHAUST VALVE UNLEADED

Product Code: 12H462

£11.34

£9.45 ex. VAT

each x

R/PILLARS - CENTRAL OIL FEED

Product Code: AEH762/3C

Has been superseded by

ROCKER PEDESTAL - CENTRAL OIL FEED

Product Code: AEH762C

£233.94

£194.95 ex. VAT

PAIR x

R/PILLARS - OFFSET OIL FEED

Product Code: AEH762/3O

Has been superseded by

ROCKER PEDESTAL - OFFSET OIL FEED

Product Code: AEH762OS

£87.42

£72.85 ex. VAT

each x

ROCKER PEDESTAL - CENTRAL OIL FEED

Product Code: AEH762C

£233.94

£194.95 ex. VAT

PAIR x

ROCKER PEDESTAL - OFFSET OIL FEED

Product Code: AEH762OS

£87.42

£72.85 ex. VAT

each x

SPACER SET ROCKER SHAFT

Product Code: AEH764

£21.00

£17.50 ex. VAT

SET x

SPACER SET ROCKER SHAFT

Product Code: AEH764/5

Has been superseded by

SPACER SET ROCKER SHAFT

Product Code: AEH764

£21.00

£17.50 ex. VAT

SET x

MGA MGB New rocker arms

Product Code: 12H3377

Quantity 8

£15.48

£12.90 ex. VAT

each x

MGB-A Rebuit rocker assy (In-line oil feed)

Product Code: 12H3377A

£143.94

£119.95 ex. VAT

each x

MGB-A Rebuilt rocker assy (off set oil feed)

Product Code: 12H3377OS

£143.94

£119.95 ex. VAT

each x

RALLY SPEC MGA HEAD *SUR50*

Product Code: MGA100

RALLY SPEC MGA HEAD LF *SUR50*

Product Code: MGA100UNLD

RACE SPEC MGA HEAD *SUR50*

Product Code: MGA101

RACE SPEC MGA HEAD LF *SUR50*

Product Code: MGA101UNLD

FAST ROAD MGA HEAD *SUR50*

Product Code: MGA99

FAST ROAD MGA HEAD LF *SUR50*

Product Code: MGA99UNLD

Products not on diagram

ALLOY CAP VALVE SPRING MGB MGA

Product Code: 12H3309ALY

£4.68

£3.90 ex. VAT

each x

CAP VALVE SPRING BOTTOM MGB/A

Product Code: 12H3354

£4.79

£3.99 ex. VAT

each x

THERMOSTAT HOUSING

Product Code: 12H830

FASTROAD UNLD HEAD MGA *SUR100*

Product Code: 48G216UNLD

£810.00

£675.00 ex. VAT

each x

MGA 1500/1600 RECON C.O.U.

Product Code: 48G31E

Has been superseded by

L/FREE HEAD STD VALVES/GUIDES C.O.U

Product Code: 48G31AUNLD

£1,164.00

£970.00 ex. VAT

each x

USE 48G31AUNLD OR 48G31BUNLD

Product Code: 48G31UNLD

MGA/B ALLOY CYL HEAD WITH STUDS

Product Code: ALY1001

£1,866.00

£1,555.00 ex. VAT

KIT x

ALLOY CYLINDER HEAD FITTING KIT

Product Code: ALY2000

£47.10

£39.25 ex. VAT

KIT x

ALLOY CYL HEAD STUD KIT

Product Code: ALY2005

£105.06

£87.55 ex. VAT

KIT x

VALVE SPRINGS RACE/RALLY MGA/B

Product Code: CVS1001R

£87.16

£72.63 ex. VAT

SET x

ROCKER COVER ALLOY CRACKLE BLK

Product Code: GAC4069

£59.00

£49.17 ex. VAT

each x

Set Screw 1/4 UNF x 1/2 inch Stainless Steel

Product Code: SH604041SS

£0.18

£0.15 ex. VAT

each x

Rocker pillar plain - used

Product Code: 12H390U

£12.00

£10.00 ex. VAT

each x

Rocker shaft tuftrided

Product Code: 11G62TUFT

£35.51

£29.59 ex. VAT

each x

Cap competition valve spring SET of 8

Product Code: CVS1001CAP

£104.88

£87.40 ex. VAT

SET x

Thermostat housing Stud Kit MGA/MGB

Product Code: EBK3002

£5.94

£4.95 ex. VAT

KIT x

Cylinder Heads: Standard & modified for unleaded fuel & performance use

Item

Description

Action

Products not on diagram

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Cylinder Heads: Standard & modified for unleaded fuel & performance use

Item

Description

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Products not on diagram

Basket

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