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Noonan
We design, develop and manufacture engines for the ultimate form of racing. We innovate with new thinking and engineering to create the ultimate Porsche powerplant working together to give our clients their ultimate race on the track.
Noonan founded the business armed with an expansive background in drag racing and has formed a team of like-minded technical and business specialists, all with their own unique skills and experience to collaborate with customers and vendors. Our aim is to create a winning partnership whether that results in a world record, a race win or a personal best performance. We keep the racer in mind, striving to ensure customer satisfaction both on and off the track.
This Crankcase is for a 4.0L conversion with 109mm spigot bearings.

Fits:
Porsche 964
Noonan delivers the worlds first all Billet 911 Porsche case, bringing the almost extinct engine back in a more reliable and race ready application.
The Noonan Billet 911 (964) case has been developed utilising the 911 Porsche cast architecture and brings a new levels of strength and rigidity to extend engine life for endurance road racing applications or the die hard Porsche restorer.
After a successful season of on track testing with Renn-Link Racing, USA the engine case is now being released to the marketplace.
The engine showed incredible durability and reliability throughout the season with almost 60 hours on track time utilizing the same bearings. Team Crew Chief – Tim Carey said “the engine has exceeded our expectations beyond belief. We have always had to replace bearings at 25-30 hours and generally scrap the engine case due to fatigue and cracking in the weak zones, the billet case has by far out performed this and we are excited to see how far we can really push it.”
The billet case is manufactured from 6061 Aluminium sourced locally in America.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9641090510
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93