Race engines, machined and assembled in Springfield, Virginia.
Inline Performance Products has spent three decades building the parts that let Honda and Acura engines survive power levels they were never designed to see. What began as a machine shop serving local racers is now a manufacturer shipping cylinder head packages, connecting rods, head stud kits and swap hardware worldwide.
Everything starts on the machine
Adapter plates, fuel rails, tensioners and sleeving are cut in-house. That means we control tolerances, we can revise a design the same week a customer finds its limit on track, and we can build one-off parts for a program that does not have an off-the-shelf answer.
Proven where it counts
Our own S2000 development cars run the same hardware we sell. If a part is in the catalogue it has been through a season of abuse first — not a dyno pull and a photo shoot.
Core program
Many of our cylinder head and short block packages are built on your core. Send us the assembly, we machine and blueprint it to the stage you select, and it ships back ready to install. Cores must be returned within 30 days of the invoice paid date.
Ordering from outside the United States
We ship worldwide, but not through the website. Contact us with what you need and we will arrange the order and payment with you directly.