LE Stands for "Leading Edge", another mutual development of Hoffman Automotive Machine and Raby's Aircooled Technology! These heads are members are the newest generation of proven cylinder heads for the VW/ Porsche Type 4 engine. All "LE" series heads feature full CNC (computer numerically controlled) machining techniques. The CNC technology enhances repeatability between ports and chambers and therefore boosts efficiency all while reducing overall costs and allowing more performance! If it sounds like a dream, wake up and realize this is reality brought to you by the team at Aircooled Technology!

ALL CYLINDER HEADS BASED FROM 100% NEW HEAD CASTINGS! WE DO NOT "REBUILD" ANY 30 YEAR OLD CYLINDER HEADS! All heads feature our pedigreed "no drop seat" upgrades along with the highest quality valves, springs, retainers, guides and hardware. We literally "Rebuild" brand new cylinder heads to meet our expectations! For more general information about our Type 4 cylinder head product line please see the "General cylinder head information pages".

Frequently asked questions about these heads, answered:

The LE 180- Bus couples the intake and exhaust ports of the famed Porsche 914 2 .0L head with the original chamber shape and spark plug location of the 2.0 Bus cylinder head.

The LE 180-914 IS compatible with stock D and L Jetronic EFI systems when used on engines up to, but not exceeding 2056cc. (to work with 2.0 3 stud intakes optional "3 studding" is required)

The LE 180-Bus DOES work well with otherwise 100% stock engines of 1.8-2.0 liters.

The LE 180- Bus Does work well with stock camshafts.

The LE 180-Bus head DOES have the original spark plug location of the 2.0/ BUS cylinder head.

The LE 180- Bus is NOT recommended for engines larger than 2270cc. See our LE 190 and larger profiles for larger engines.

The LE 180-Bus has benefited from valve seat upgrades to eliminate dropped valve seats and related issues.

The LE 180-Bus does NOT utilize the stock head gaskets as original. These heads are set up to eliminate issues with these gaskets, per the VW Bulletin released in 1981.

The LE 180-Bus is an offering that's more for the budget minded consumer that wants exceptional port flow, but is willing to sacrifice a tad bit of power while saving some money on the product.

The LE 180-Bus does this by retaining the stock, "as cast" chamber and spark plug locations. The plug relocation and chamber mods add power but also add a couple hundred dollars to the price tag. These heads are standard equipment on our more budget minded, lower revving engine kits from 2056-2270cc.

As with all of our cylinder heads the LE 180-Bus receives the best components and labor that can be supplied. All our cylinder heads feature updated valve seats, guides, springs and retainers and are sold 100% complete and ready to install onto your Type 4 engine. Please note that rocker arm assemblies and valve covers are not supplied with our cylinder heads, but they are available separately through our retail store.

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Technical specifications for the RAT LE 180-914 cylinder heads:

Head casting type- NEW  2.0L Bus castings modified to 2.0/914

Combustion chamber shape- As cast 2.0 BUS

Combustion chamber volume- 50cc+/-

Spark plug location- Original plug location, no modifications made

Spark plug diameter- 14mm, as original

Valve sizes- 42mm Intake/ 36mm Exhaust

Port work- Fully digitized CNC machined intake and exhaust ports that flow within 2% of the OEM 2.0 914 cylinder head!

Valve type- Stainless Steel

Valve Springs- RAT single heavy duty. Will control valves to 6,250 RPM +/- dependant upon camshaft and valve train mass.

Valve spring pressures- 215#@ .500 lift/ 120# seated

Retainers- Chromoly steel

Intake manifold pattern- original 4 stud pattern, no alterations made. Port matched manifolds are not included in the price. Installer is responsible for port matching manifolds.

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If you would like to learn more about the LE 180 Bus cylinder heads please follow this link to our retail store where you may submit a question about this component, or add it to your cart or wish list for immediate or future purchase.

Click here to visit the LE 180-Bus heads at The Type 4 Store

Please note that most cylinder heads are not kept in stock. Please allow 4-8 weeks for most cylinder head orders to be completed . Good components take time to create, and cylinder heads can't be rushed through their processes- we refuse to allow the calendar get in our way of offering the best cylinder heads for the Type 4 engine! All cylinder head orders MUST be paid for in full at the time of the order.