Flow Performance
Cylinder Bore Adaptors
Flow Performance FA series Cylinder Bore Adaptor plates facilitate the mounting of cylinder heads to the Flow Performance FR4 flow receptacle. The FA series adaptors allow precise location of cylinder heads for realistic and repeatable flow testing time after time.
FA4.0 4" Cylinder Bore Adaptor $99.00
Custom sizes $199

The FA series adaptors are available in a range of sizes. The plastic bores have plenty of wall thickness and can be sanded to a precise dimension
Drilling locating dowel holes into adaptor plates
Most cylinder heads are located on an engine block using 2 or more dowel pins. But these dowel pins are not always convenient to use when locating a cylinder head on the Cylinder Bore Adaptor plate. Instead, the bolt holes that are used to bolt the cylinder head to an engine block can be used to locate the head on the adaptor plate.
By positioning the adaptor plate in the proper location on a cylinder head and securing with C clamps, the head bolt holes can be used as a guide to drill dowel pin holes into the adaptor plate.
Holes drilled into the adaptor plate, using the head bolt holes as guides, can be used to insert dowel pins to locate the head onto the adaptor plate.
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The FA series Cylinder Bore Adaptor plates fit into the FR4 flow receptacle to locate cylinder heads onto the FR4
Stock Sizes: $99.00

FA2.0  2.070"
FA2.4  2.385
FA2.5  2.450"
FA2.9  2.895"
FA3.0  3.070"
FA3.5  3.515
FA4.0  4.00"
We can make just about any size up to 4.30". Contact us for your size.