SKU: 14011-4 | UPC: 807298078298
Manley Mazda Miata 1.6L/1.8L B6/BP H-Beam Connecting Rod Set 1990-2005
Manley H-Beam connecting rods upgrade Mazda Miata engines in 1990-2005 models with 1.6L B6 and 1.8L BP powerplants across NA and NB chassis. Forged from 4340 aircraft-quality steel these rods deliver strength for high-revving builds up to 500+ whp with ARP 2000 bolts standard. Precise 137mm center-to-center length ensures compatibility and balance for street or track reliability.
Key Features
- Exacting Tolerances: Honed to tight specs on bend twist and size for accurate assembly consistent power and reduced vibration in performance engines
- Attention to Detail: Rigorous inspection of threads balance and dimensions guarantees durability under extreme stress and heat
- Track Performance: Handles elevated RPM and boost levels beyond stock limits for competitive advantage in racing
- Forged 4340 Steel: High-tensile chromoly construction with 137mm C-C length 48mm small end bore 53mm big end bore each rod weighs 542 grams
- Bolt Flexibility: ARP 2000 3/8 x 1.250-inch bolts included option for ARP 8740 bolts supports high-torque applications
Product Notes
- Rod bearings pistons and hardware not included balance as a set after installation
- Inspect rods for size prior to use resize big ends if needed
- Ships securely in protective packaging handles rough transit
Installation Notes
- Professional installation recommended.
- Match piston wrist pin diameter to 48mm small end bore
- Compatible with stock and aftermarket crankshafts torque bolts to ARP specs
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1990-1997 | Mazda | Miata | Base |
| 1999-2005 | Mazda | Miata | Base |
| 1993 | Mazda | Miata | LE |
| 2000-2005 | Mazda | Miata | LS |
| 1994-1997 | Mazda | Miata | M Edition |
| 2004-2005 | Mazda | Miata | Mazdaspeed |
| 1991 | Mazda | Miata | SE |
| 2000-2003 | Mazda | Miata | SE |
| 1999 | Mazda | Miata | 10th Anniversary |
| 2003 | Mazda | Miata | Shinsen |
| 1997 | Mazda | Miata | STO |
Why Choose Manley?
- Decades of racing heritage with parts trusted in drag road race and endurance events
- USA-made forging and machining for consistent quality in every set
- Engineered dimensions and finishes that support 500+ whp builds
Frequently Asked Questions
-
Q: Will this fit both 1.6L B6 and 1.8L BP Miata engines?
A: Yes designed for 1990-1993 1.6L B6 and 1994-2005 1.8L BP engines across NA and NB chassis -
Q: What material and bolt specs are used?
A: Forged 4340 aircraft-quality steel with ARP 2000 cap screws option for 8740 rated for high torque applications -
Q: What is the warranty and install process?
A: Manley offers defect warranty hone and balance set post-purchase professional engine builder advised for best results
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Custom Manley box 14 x 8 x 4 inches
- Weight: 8.1 lbs
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