Supertech BMW M20 Black Nitrided Exhaust Valve - Set of 6

Shop BMW M parts and accessories for exhaust, intake, cooling, brake, suspension and exterior projects at Black Ops Auto Works. Explore Akrapovic, Dinan, do88 and other listed options across BMW M applications. Start with your exact model, chassis and engine to compare parts for the build you have in mind.Exhaust, Intake and Cooling ChoicesCompare Akrapovic exhaust systems and Dinan intake or axle-back applications for the specific M model. Some exhaust listings require a separate tip set, so review the system and finishing pieces together. do88 cooling and airflow options distinguish applications such as F8X, G8X and earlier M generations; select the components that match your engine and current setup.Brakes and Suspension for Your ProjectExplore applicable pads, rotors and service components from the listed brake brands, alongside Bilstein, H&R, Dinan and SPL suspension options. Match the actual brake package before comparing friction choices, including rotor material and dime...

Shop Supertech engine-build components at Black Ops Auto Works. Explore intake and exhaust valves, valve-spring kits, guides, retainers, pistons and supporting hardware. Coordinate the selection with your engine builder’s measured specifications and complete cylinder-head or short-block plan.Intake and Exhaust Valve ChoicesChoose intake or exhaust valves by exact engine code, head diameter, stem dimensions, length, material and groove arrangement. Compare standard and oversized options using the cylinder head’s measured requirements. Coordinate any oversize selection with the builder’s machining plan, valve guides and seats before ordering the complete set.Valve Springs, Retainers and LocksBuild the spring package around the camshaft and the cylinder head’s measured installed height, pressures and clearances. Single, dual, beehive and conical springs have different mating-component requirements. Check whether the selected Supertech spring requires its specified retainer, seat or loc...

Build a matched cylinder-head assembly with intake and exhaust valves from Supertech, Ferrea, GSC Power-Division, Brian Crower and Skunk2. Compare standard and oversize head diameters, stem dimensions, materials and groove designs for the exact engine and cylinder head. Plan the choice with the machine shop and the complete valvetrain specification.Intake and Exhaust Valve ChoicesThe catalog spans many Honda, Toyota, Nissan, Subaru, Mitsubishi, VW/Audi, BMW and domestic engine references. Intake and exhaust valves can have different head sizes, lengths and materials within the same engine.Compare stainless, nitrided, chrome-polished, Inconel/superalloy and other named designs by manufacturer application and intended thermal/operating requirements. A material label alone does not establish interchangeable dimensions or a guaranteed power increase.Standard, Oversize and Extended GeometryOversize head diameter can require seat and chamber work. It is different from an oversize stem or ...

Plan a coordinated cylinder-head service or performance build with engine valves, guides, seals, springs, retainers and keepers. Browse Supertech, GSC Power-Division, Ferrea, Brian Crower, COMP Cams and other listed references, plus valve covers and sealing hardware. Start with the engine, cylinder heads and actual camshaft/valve arrangement.Valves, Guides and Oil SealsChoose intake and exhaust valves by complete dimensions, material and groove design. Standard and oversize head diameters have different machining needs; a larger valve is not automatically a drop-in or a power improvement.Match guides to the head bore, valve stem and approved installed geometry. Seals must fit both stem and guide, with correct intake/exhaust coverage and any integrated-seat requirement. Use the exact companion references when a manufacturer specifies a matched combination.Springs, Retainers and LocksCompare single, dual and beehive spring packages against the cam requirements and measured installed h...