Cylinder Head

Fully rebuilt and converted for use with unleaded fuel. The 12g295 head is the open chamber, big valve performance head for small-bore motors. You can see the similarity to the

This adaper screws into the cylinder head. It is required when converting to mechanical water temperature gauge. Fits Lucas, Smiths, and other gauges.

Brass plug, 1098-1275cc engines. Often removed to clean the oil relief galley.

Improved cylinder head nut with integral flange replacing the earlier separate washer. Maintains clamping force for even torque. Sold each.

Some engines have the coil on a small bracket which is held to the engine on a cylinder head stud. This is the special extra-length version of the short cylinder head stud to give the little bit of extra threads it needs to allow the coil bracket to be fitted.

Long stud for cylinder head, use four (4). Sold each. Aftermarket.

Short cylinder head stud. Sold each. Aftermarket.

All-new aluminum 1275 cylinder head, based on the 12G1805/12G940 late Cooper S head casting. 1.4" intake and 1.15" exhaust valves, with hardened valve seats, bronze guides

All-new aluminum 11-stud 1275 race cylinder head, based on the 12G1805/12G940 late Cooper S head casting.

Cylinder head for single-point injection (SPi) classic Minis. Casting #12G940, rebuilt fully in our shop with all new iron valve guides, exhaust valves and seals

A 1275 cylinder head, casting #12G940, rebuilt fully in our shop with all new iron valve guides, unleaded exhaust seats, exhaust valves and seals. Inlet valve is large 1.4" size

Fully rebuilt in our shop to include all new iron valve guides, unleaded exhaust seats, exhaust valves and seals. Modified for unleaded fuel.

Rebuilt completely in our machine shop, this head will include all new exhaust valves, guides and seals. Unleaded exhaust valve seats are installed. Springs and intake valves checked. Resurfaced

Inlet Valves: 35.7mm(1.401") dia. modified original equipment type Exhaust Valves: 29.3mm(1.150") dia. modified original equipment type Exhaust seats: Latest type Beryllium-based for lead-free fuel Valve Guides: Cast iron Valve Springs:

Vintage/SCCA Regional/autocross spec race head, with unleaded seat conversion. Keith Calver has performed hours and hours of testing to perfect his own range of modified cylinder heads. Years of development

Heavy steel metal brackets are used in pairs to lift the engine. Attach to valve cover studs. Sold each.

Most cylinder head used this fitting to connect the bypass hose to the water pump. It was deleted on later, A+ engines. If you are using an A+ head on

High-spec ARP-made flat washer to fit 3/8" stud or bolt. Thicker than most washers and parallel ground for flatness.

ARP high-spec washer for 3/8" stud. OD is .625" and thickness is .062. Black finish. Parallel ground for perfect fit and no loss of torque through your fasteners. Sold each.

ARP high-grade washer for head stud application. ID is for 3/8" stud, OD is .675" and .120" thickness to provide reliable torque through your fasteners.

Gasket for the heater control valve on the cylinder head. Used under the blanking plate, also.

Valve / rocker cover gasket with notches for 10th and 11th studs of a Cooper S head. Originally fiber, now manufactured in cork.

All A-series and A+ engines can use the same valve cover gasket. May require slight trimming on Cooper S models that have the extra head studs. Order (2) 12A1358 valve

Special, tapered 5/16" cylinder head bolt as used on the water pump end of the Cooper S block, as it was deemed that there was not enough material in the Cooper S block to support a 3/8" stud.

Head gasket set for all 1275 engines with twin or single HS carburetors. This set fits all 1275cc based engines and includes a black Payen AF470 composite head gasket.

This set from Payen fits all 1275cc based engines and includes a copper-composite head gasket

Copper head gasket supplied in this set. Seven supplies name brand head gasket sets from Payen, Unipart and other reliable manufacturers, not "no-name" gaskets. This set fits all "small bore"

Grey composite head gasket with steel fire rings for standard 1275/1300 engines.

This is the modern black BK450 head gasket with sealant coating. It gives good results in even high compression engines and the heat-activated shellac type coating helps prevent leaks. Formerly

Black composite head gasket for 1275cc or bigger Minis. This one is marked AF470 and features an improved seal for the rocker oil feed. Shellac finish is heat activated to

This is the "old reliable" copper 1275 head gasket that has been used since the 60s. A modern material now replaces the asbestos, but it still used by many for

This is the upgraded copper-composite head gasket for "small-bore" 850-1098cc. These are genuine Payen or Unipart-packaged Payen gaskets, with a 2.8cc compressed volume.

This is a high-compression gasket that was specially developed for 1275 Metros raced in England. It requires a recess to be machined in the top of the block around each

Very complete kit includs all of the head studs, plus rocker studs. Parallel ground washers and 12 point nuts are included. Renowned Automotive Racing Products

Complete set of ARP head and rocker studs for 9-stud A-Series and A+ engines. Includes 12-point nuts and paralell-ground hardened washers for precise fitting. Accurate torque readings can be achieved

Complete ARP head stud kit for 970, 1071 and 1275 Cooper S classic Minis. Includes all 10 head studs, one bolt, and rocker studs.

ARP head stud, 5.65". Sold each.

ARP head stud, 4.25". Sold each.

Minis with no heater will need to block off the outlet on the cylinder head with the 2A180 plate. Use 2 53K0402 studs if required and gasket 88G0221B.

Small stud to secure heater valve or blanking plate to cylinder head.

Metal alignment sleeves to position the inlet manifold accurately in the cylinder head. Will not fit manifolds where the locating step has been machined or polished away. Sold each.

A thicker intake/exhaust gasket with large inlet and exhaust port cutouts for use with modified cylinder heads and/or headers.

Metal-faced manifold gasket, as used on all fuel injected SPi (single-point injection) and MPi (multi-point injection) Minis.

Stock gasket between the intake and exhaust manifold and the cylinder head. Use SIE0039 for modified heads and GUG704053MG for injected cars.

Made from brass for heat and corrosion resistance, these nuts are intended specifically for this application. See also 51K1177 long nuts. Sold each.

Brass nut is about 1" long for easier tool access in the congested area of the carbs, intake and exhaust. Made from brass for heat resistance and

A complete stainless steel stud and hardware set for the manifold face of your cylinder head. This is the standard grade product for when the high-spec ARP product is

Stock replacement stud for intake and exhaust manifold. Use six (6) per head. See also 53K0487SS for individual stainless studs or SEN0455 for ARP stainless set with nuts. See also GHF0261