Checkered Flag Performance 3.780 Tapered Piston Ring Compressor

Used this on my LM7 rebuild. I use stock sized pistons and rings and this tool made installing the ringed pistons into the cylinders a breeze. HIGHLY recommend. Personally prefer this over the adjustable compressors as you know you wont be making it too tight or too loose. Obviously the only trade off is having to buy an individual compressor for each engine build assuming you have different cylinder sizes on your other builds.

One of the best investments I’ve made.

Good finish and great fitment. Ill never use a clamp style again unless its a one time thing. Even let a friend of mine with next to no mechanical knowledge pop a couple pistons in and had no issues.

Yes it is bore specific. But you will never install pistons faster than you ever have without it. Fast, easy,great tool for installing stock bore Ls 5.3 pistons.

Works excellent for a stock rebuild on a 5.3 ls. Pistons slide right into the block no problem.

These style ping ring compressors are hands down the best. Totally worth the money and they make installing pistons into cylinders a breeze with the rings installed. The only downside is having to buy for all cylinder configurations. Highly recommend!

perfect for 5.3

Made installing the pistons in my 5.3 lm7 a cake walk. The top starts off wide and when you push the piston down it gradually closes the ring gap to fit in the bore. Yes Ill probably only use this 2 or 3 times MAYBE, but it is worth the 20 bucks to compress the rings down to fit easliy

These are inexpensive enough for the shade tree mechanic to own even if you only do 1 motor. I have used the universal ratcheting band type and have cut both hands. This tool makes installing pistons a breeze.

The piston ring cup worked great it was a great buy. Thanks for this great product.