http://auto-specs.zercustoms.com The RSS feed of the latest 10 Neuspeed specifications at Auto Specifications en http://auto-specs.zercustoms.com/n/neuspeed/2006-neuspeed-civic-si-specifications.html 2006 Neuspeed Civic Si Specifications - Specs engine Aluminum-Alloy Inline-4 aspiration Natural valvetrain 4 Valves per Cyl w/i-VTEC displacement 1998 cc / 121.9 cu in bore 86 mm / 3.39 in stroke