ProForm Pneumatic Valve Spring Compressor | #66849 star_border star_border star_border star_border star_border Pneumatic Valve Spring Compressor Cut cylinder head assembly and disassembly time in half with the Proform pneumatic valve spring compressor. Builds 350 lbs. of force with 125 psi, and will operate on a minimum of 100 psi. The compressor arm slides for... MSRP: Was: Now: $385.99 add Add to Cart favorite_border sync remove_red_eye