Crystal Publications Performance Pro Series is jam-packed with hard-to-find high-performance information for the Harley-Davidson V-twin. If you are hungry for more performance, designing or building an engine, or interested in street, dyno or trackside tuning, the Performance Pro Series will help you maximize the performance of your engine and bike. Whether you’re into superior street performance, dyno shoot-outs or all-out racing, the Performance Pro Series by Crystal Publications is the ultimate Harley-Davidson high-performance series. Crammed with power secrets, it’s your “performance edge” for a winning combination.
The Performance Pro Series includes the Big Twin High-Performance Guide, volume one, and the V-Twin Tuner’s Handbook, volumes one and two.
Hello Denny,
I contacted you over a year ago in regards to your Big Twin Performance, Vol#1. and at that time you did not have any more catalogs published and you were taking time off. I followed up in January and you said to check back in 6 months or so. I found your performance pro series info on your website and wonder if these are available for sale now? Please let me know as Nolan would be excited to have a copy. Thanks, Stacie Adou, (Grabber Power Products)
