This is a brand new 89 mm piston and liner kit as purchased from British Parts Northwest. The pistons have never been out of the box. there is nothing wrong with these. I just don't have the project they were intended for anymore. Here is description verbatim off the British Parts website:
There is No substitute for cubic inches! This is the largest piston and liner kit that you can buy without machining the block on your Triumph TR3, TR4 and TR4A Engine. Each liner has been reinforced with a 2mm thicker body for more strength and greater stability. Each piston is a short skirt design making for lighter weight and less drag plus each piston has drilled oil return holes instead of oil slot for greater strength. With each liner being bored to match the piston, fitment and correct clearance will be assured. Each kit comes complete with Pistons, Liners, Deves Rings, Pins and Clips. No machining is required to your block; these press in just like the 86mm or 87mm liners. Can only be used with Heavy Duty Head Gasket AE330HD. Open up the power potential in your Triumph Engine with this kit
Call me if interested at . Please leave a mesage if I don't pick up. I will return your call ASAP!
Location: Charleston sc

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