For a limited time we have G320 cylinders on sale for $35 with the option of adding our billet overpower bolt on performance transfer port plates for $33.99. Retail on the plates alone is $68.99 and for a limited time you'll receive a free G320 cylinder. We are also offering porting for an additional $30. We made it to where you can just swap the cylinder by itself and instantly add power to your G320 engine.