Barr MC-1-99746 Exhaust Manifold | Mercruiser GM V6
Barr MC-1-99746 Exhaust Manifold | Mercruiser GM V6
Barr Marine
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Barr MC-1-99746 — Mercruiser GM V6 Exhaust Manifold
Barr MC-1-99746 is a cast iron center rise exhaust manifold, a direct replacement for Mercruiser center rise V6 229 and 262 cu. in. 175, 185, 205, and 262 4.3L/4.3LX engines, including 185R, 185MR, 205R, and 205MR models. Interchangeable between port and starboard side. Includes gaskets and mounting hardware. Heavy duty cast iron, painted black. Replaces Barr MC1-99746 and Mercruiser 99746A17, 99746A8, 99746A3, and Osco 9745. This item is not eligible for free shipping.
Part Specifications
- Barr Part Number: MC-1-99746
- Type: Center rise exhaust manifold
- Application: Mercruiser GM V6 229/262 cid, 175/185/205/262 4.3L/4.3LX, including 185R, 185MR, 205R, 205MR
- Side: Interchangeable between port and starboard
- Includes: Gaskets and mounting hardware
- Material: Heavy duty cast iron, black paint
- Replaces: Mercruiser 99746A17, 99746A8, 99746A3; Osco 9745
Confirm Fitment Before Ordering
Not sure if this manifold fits your engine? You can check the parts diagrams available on our website to help identify the correct part. Or, give us your engine model and serial number and we'll confirm it for you before you order — by email, text, or live chat.
Additional Information
- Vendor: Barr Marine
- Part Number: MC-1-99746
- OEM Cross-Reference: Mercruiser 99746A17, 99746A8, 99746A3; Osco 9745
- Kit Contents: Manifold with gaskets and mounting hardware
Installation Notes
Install following the applicable Mercruiser service manual for your engine model.
Frequently Asked Questions
Q: How do I confirm this manifold fits my engine?
A: Check the parts diagrams available on our website, or send us your Mercruiser engine model and serial number and we'll confirm MC-1-99746 is the correct manifold for your engine — by email, text, or live chat.
Q: Can I use this on either the port or starboard side?
A: Yes, this manifold is interchangeable between port and starboard side, so one part number covers both positions.
Q: Does this include gaskets and hardware?
A: Yes, this manifold ships complete with gaskets and mounting hardware.
Q: What Mercruiser part numbers does this replace?
A: It replaces Mercruiser 99746A17, 99746A8, and 99746A3, as well as Osco 9745.
Q: Why is this item not eligible for free shipping?
A: Due to its weight, this manifold ships at an additional freight cost calculated at checkout.
! Compatibility references are provided for informational purposes only and do not constitute a fitment guarantee. Part numbers, application listings, and "replaces" cross-references are based on manufacturer data and are intended as a starting point for identification — not a guarantee of fit for your specific engine, hull, or installation.
Buyer is solely responsible for verifying compatibility with their engine model, serial number, model year, and trim configuration before purchase. If you are unsure whether this part fits your application, contact MacombMarineParts.com before you buy — we're available via text, email, or online chat to help verify compatibility for your specific application.
MacombMarineParts.com is not liable for parts ordered based on assumed fitment. Returns due to buyer-selected incorrect fitment are subject to our standard return and restocking fee policies.