Carrillo Pro-A Connecting Rods w. WMC Bolts (Set of 4) - NA/NB Miata (90-05)

Set of four Carrillo Pro-A forged steel A-beam connecting rods with 5/16 in. WMC bolts for the Mazda B6 1.6L and BP 1.8L engines in the 1990-1997 Mazda Miata (NA) and 1999-2005 Mazda Miata (NB). Pro-A is the lightest and least expensive of Carrillo's rods for this engine; for higher loads Carrillo offers the Pro-SA and Pro-H. These are standard-length rods for engine builds with matching performance pistons.

• Pro-A A-beam design: the lightest Carrillo rod for the B6/BP
• 133 mm (5.233 in.) center-to-center, the standard B6/BP length; 20 mm wrist pin; 1.8903 in. (48.01 mm) big-end bore; 0.86 in. big-end and small-end width
• Weight: about 416 g per rod
• Carrillo 5/16 in. WMC rod bolts: H-11 tool steel fasteners that CP-Carrillo rates for about 15-18 torque cycles; Carrillo recommends tightening by bolt stretch (to 80% of yield) rather than by torque
• Forged from oversized blanks of Carrilloy, Carrillo's chrome-nickel-moly-vanadium steel, and made in the USA; every rod is magnafluxed, Rockwell tested and shot peened, with spare rods matched to the set within 1 g
• Set of 4 rods with bolts; special-order item from Carrillo, not cancelable once ordered

Fitment: Mazda B6 1.6L and BP 1.8L engines; Carrillo lists one rod for both. 1990-1997 Mazda Miata (NA) and 1999-2005 Mazda Miata (NB), including the 2004-2005 Mazdaspeed. Not for the 2006+ MX-5 (NC/ND), which use different engines.

Part number: Carrillo SCR4856-4

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