SD Performances uses Ross Racing Pistons exclusively in all our engines and kits, there's lots of cheaper pistons out there, but the old saying you get what you pay for applies. Pistons are a critical internal engine component and saving a few bucks on a cheaper product shouldn't be considered when building a quality engine. Ross is the leader in producing the most precise pistons on the market today and for that reason SD Performance only sells and uses Ross Racing Pistons. We have years of experience helping our customers design piston configurations for their engines, give us a call or shoot us an e-mail for more details.