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

Set of four Carrillo Pro-H forged steel H-beam connecting rods with 5/16 in. CARR 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-H is the strongest of Carrillo's three standard rod designs for this engine, ahead of the Pro-SA and Pro-A. These are standard-length rods for engine builds with matching performance pistons.

• Pro-H H-beam design, Carrillo's highest-load option 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: 440 g per rod (310 g rotating, 130 g reciprocating)
• Carrillo 5/16 in. CARR rod bolts: Multiphase-alloy fasteners that CP-Carrillo rates for indefinite re-torquing when the stretch method is used; 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 to VAR (vacuum arc remelt) standards; 100% traceability and a multi-step final inspection, with spare rods matched to the set within 1 g
• Set of 4 rods with bolts

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 SCR4855-4

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