Free Uk Delivery available

ARP Head Studs - it is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their competition engines. Simply stated, there's not a better stud setup on the market today.
For starters, ARP uses a premium grade 8740 alloy that is rated far superior to aircraft quality. Each stud is placed vertically in special racks and precisely heat-treated to 190,000 psi. This procedure ensures complete heat penetration and the results are far superior to those lesser quality studs from other manufacturers who just dump pieces in a basket and hope for the best.
Following heat treatment, each stud is centreless ground to make it as close to perfectly concentric as possible. This procedure involves about ten very slight cuts and results in an exceptionally straight part. Note that lesser quality studs are not even centreless ground, the material is thread rolled in bar stock form (mostly before heat treatment, when the material is easier to machine). Because ARP studs are manufactured to such exacting tolerances, you will note that gaskets and cylinder heads literally glide into position and are perfectly aligned.
ARP studs are thread rolled after heat treatment, which gives them about 2000% (that's twenty times) better fatigue strength compared with studs that are threaded prior to heat-treat (a very common industry practice). It costs a lot more to do it this way, because it's tough on tooling, but the results are well worth the extra effort.
You won't find a better quality stud on the market from any other source. Look for ARP stamped on each stud as your assurance of quality.

Ford Lotus Twin Cam 8v 1558cc
Application:
  • Ford Lotus Cortina Mk1 1963-1966
  • Ford Lotus Cortina Mk2 1967-1970
  • Ford Escort Twin Cam 1968-1970
  • Lotus Elan 1962-1974
  • Lotus Europa 1971-1975
  • Caterham 7 1973–1974
Installation instructions:

To ensure proper thread engagement and accurate torque readings, clean ALL threads in the block (ideally with a thread chaser or tap).

Clean and inspect all hardware prior to installation. Look for obvious defects or shipping damages, plus proper fit, length and dimension.

Screw studs into the block “HAND TIGHT ONLY”. NOTE: LOCTITE MAY BE USED IF A PERMANENT MOUNTING OF THE STUDS IS PREFERRED. THE FASTENERS, HOWEVER, MUST BE TORQUED PRIOR TO THE LOCTITE SETTING UP.

Install the cylinder head and check for binding or misalignment.

Lubricate the stud threads, nuts and washers with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT. Then install the washers and the nuts onto the studs and tighten them hand tight.

ARP recommends using the ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT that is provided with each kit as opposed to engine oil. This is due to higher friction on the studs as well as inconsistencies in the clamping force of the fasteners when engine oil or other low quality lubricants are used.

PRELOAD (TORQUE) RECOMMENDATIONS:

Following the manufacturers recommended torque sequence tighten the nuts in three equal steps to 80ft lbs with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT.

More Information
Part NoARPHD02
Fits Engine TypeFord Lotus Twin Cam 1558cc 8v
Product GroupHead Bolts & Studs
Stock StatusAvailable From Stock
Fits Engine MakeFord
Catalogue 2024 PageClick HERE to view this part on page 45 of our 2024 catalogue
Brand LogoARP
Shipping & Delivery

We aim to dispatch all stocked orders either same day (Monday-Friday) or by the following working day (subject to time of order). Orders are shipped by DHL courier service.

For orders that require a guaranteed quick delivery, please contact our sales staff directly by phone who can advise further on your request.

Shipping Prices UK

All orders under £250 will be sent by DHL courier service
Up to 3kg £8.00
3kg-20kg £9.60

All UK orders over £250 are shipped free of charge by DHL.

Shipping Prices Overseas

All deliveries are sent by DHL courier service. Most European countries have the option of an Economy Road Service (with prices starting from £26.00) and Express Air Service. All non-European countries are sent by DHL Air Express. To get a quote for shipping, simply enter the items into the cart, click on ‘My Cart’ and select your country. You do not need to be logged in to use this service.

Note: we are unable to export dangerous goods such as aerosol cans and such items must be removed from the cart before you can proceed with your order.

ARP Head Studs - it is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their competition engines. Simply stated, there's not a better stud setup on the market today.
For starters, ARP uses a premium grade 8740 alloy that is rated far superior to aircraft quality. Each stud is placed vertically in special racks and precisely heat-treated to 190,000 psi. This procedure ensures complete heat penetration and the results are far superior to those lesser quality studs from other manufacturers who just dump pieces in a basket and hope for the best.
Following heat treatment, each stud is centreless ground to make it as close to perfectly concentric as possible. This procedure involves about ten very slight cuts and results in an exceptionally straight part. Note that lesser quality studs are not even centreless ground, the material is thread rolled in bar stock form (mostly before heat treatment, when the material is easier to machine). Because ARP studs are manufactured to such exacting tolerances, you will note that gaskets and cylinder heads literally glide into position and are perfectly aligned.
ARP studs are thread rolled after heat treatment, which gives them about 2000% (that's twenty times) better fatigue strength compared with studs that are threaded prior to heat-treat (a very common industry practice). It costs a lot more to do it this way, because it's tough on tooling, but the results are well worth the extra effort.
You won't find a better quality stud on the market from any other source. Look for ARP stamped on each stud as your assurance of quality.

Ford Lotus Twin Cam 8v 1558cc
Application:
  • Ford Lotus Cortina Mk1 1963-1966
  • Ford Lotus Cortina Mk2 1967-1970
  • Ford Escort Twin Cam 1968-1970
  • Lotus Elan 1962-1974
  • Lotus Europa 1971-1975
  • Caterham 7 1973–1974
Installation instructions:

To ensure proper thread engagement and accurate torque readings, clean ALL threads in the block (ideally with a thread chaser or tap).

Clean and inspect all hardware prior to installation. Look for obvious defects or shipping damages, plus proper fit, length and dimension.

Screw studs into the block “HAND TIGHT ONLY”. NOTE: LOCTITE MAY BE USED IF A PERMANENT MOUNTING OF THE STUDS IS PREFERRED. THE FASTENERS, HOWEVER, MUST BE TORQUED PRIOR TO THE LOCTITE SETTING UP.

Install the cylinder head and check for binding or misalignment.

Lubricate the stud threads, nuts and washers with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT. Then install the washers and the nuts onto the studs and tighten them hand tight.

ARP recommends using the ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT that is provided with each kit as opposed to engine oil. This is due to higher friction on the studs as well as inconsistencies in the clamping force of the fasteners when engine oil or other low quality lubricants are used.

PRELOAD (TORQUE) RECOMMENDATIONS:

Following the manufacturers recommended torque sequence tighten the nuts in three equal steps to 80ft lbs with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT.

More Information
Part NoARPHD02
Fits Engine TypeFord Lotus Twin Cam 1558cc 8v
Product GroupHead Bolts & Studs
Stock StatusAvailable From Stock
Fits Engine MakeFord
Catalogue 2024 PageClick HERE to view this part on page 45 of our 2024 catalogue
Brand LogoARP
Shipping & Delivery

We aim to dispatch all stocked orders either same day (Monday-Friday) or by the following working day (subject to time of order). Orders are shipped by DHL courier service.

For orders that require a guaranteed quick delivery, please contact our sales staff directly by phone who can advise further on your request.

Shipping Prices UK

All orders under £250 will be sent by DHL courier service
Up to 3kg £8.00
3kg-20kg £9.60

All UK orders over £250 are shipped free of charge by DHL.

Shipping Prices Overseas

All deliveries are sent by DHL courier service. Most European countries have the option of an Economy Road Service (with prices starting from £26.00) and Express Air Service. All non-European countries are sent by DHL Air Express. To get a quote for shipping, simply enter the items into the cart, click on ‘My Cart’ and select your country. You do not need to be logged in to use this service.

Note: we are unable to export dangerous goods such as aerosol cans and such items must be removed from the cart before you can proceed with your order.

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