ACL

ACL Performance Main Bearing Set For Mazda B6 BP 1.6L 1.8L +0.25 Oversize

Part # 5M8353H-.25 SKU 18420

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$101.99
In stock, ships from a US warehouse
Fits 1990-2005 Mazda Miata, 1990-2001 Mazda Protege, 1986-1994 Mazda 323, 1994-1997 Kia Sephia and 3 more Full fitment list
SKU: 18420
Width: 3.00 (in)
Height: 5.00 (in)
Depth: 1.00 (in)
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Free, US only. Arrives in 2–4 days.
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Highlights

Bearing size
+0.25 Oversize
Construction
Tri-Metal, Steel-Backed
Displacement
1.6L / 1.8L Inline-4
Grade type
Performance
Material
Tri-Metal (Steel-Backed)
Max wall thickness
0.0793 in
Oil clearance
Standard
Outside diameter
2.1259 in
Shaft diameter
1.9661 in
Type
Crankshaft Main Bearing Set
Width
0.694 in
Min std tunnel size
2.1259" (53.998mm)
Max overall length
0.6941" (17.63mm
Min std shaft size
1.9661" (49.938mm)
Oil control
Optimized lubrication and oil film stability
Interchange number
1986-2005 Mazda 323, Miata, MX-3, Protegé, Mercury Capri, Kia, Rio, and Kia Sephia L4 engine bearing, applications for B6 and BP 1.6L / 1.8L platforms, +0.25, oversize main bearing set.
Max wall at crown
0.0793" (2.013mm)
Application
Performance rebuilds, OEM refresh, high-RPM use

Description

ACL Performance Main Bearing Set For Mazda B6 BP 1.6L 1.8L +0.25 Oversize

The ACL Performance Main Bearing Set is engineered specifically for the Mazda B6 and BP engine families, which cover 1.6L and 1.8L displacement engines. These bearings are designed to provide optimal clearance, stiffness, and resistance to wear, ensuring the smooth operation of your engine under varying loads. With a +0.25 oversize, this set is designed to fit engines that require a slightly increased clearance for improved oil flow and reduced operating temperatures.

Crafted from high-quality materials, these main bearings feature a unique tri-metal construction that enhances durability and longevity. This construction allows for superior load distribution across the bearing surface, minimizing wear and tear. The precision-engineered design of these bearings ensures a perfect fit, which helps to maintain the integrity of the crankshaft and ensures efficient power delivery throughout the engine’s operating range.

Engineers at ACL have incorporated advanced surface treatments into the manufacturing process. These treatments reduce friction and improve oil retention, promoting better lubrication under extreme conditions. As a result, the ACL Performance Main Bearing Set not only enhances the performance of your Mazda engine but also contributes to its long-term reliability and efficiency.

FITMENT: This main bearing set is compatible with Mazda B6 and BP engines, specifically designed for 1.6L and 1.8L applications requiring a +0.25 oversize bearing configuration.

Key Features & Benefits

  • Tri-metal construction for enhanced durability and reduced wear.
  • Precision engineering ensures perfect fit and optimal clearance.
  • Designed to improve oil flow and reduce operating temperatures.
  • Advanced surface treatments minimize friction and enhance lubrication.
  • Ideal for performance applications requiring higher reliability.

Fits

1990-2005 Mazda Miata, 1990-2001 Mazda Protege, 1986-1994 Mazda 323, 1994-1997 Kia Sephia and 3 more

Fitment data from the manufacturer catalogue. Check your engine before ordering, or call us.

Specifications

Identification
BrandACL
Part number5M8353H-.25
SKU18420
Dimensions and weight
Outside diameter2.1259 in
Width0.694 in
Dimensions (W × H × D)3.00 × 5.00 × 1.00 in
Material and finish
ConstructionTri-Metal, Steel-Backed
FinishUnfinished
MaterialTri-Metal (Steel-Backed)
Series and warranty
Details
Bearing size+0.25 Oversize
Displacement1.6L / 1.8L Inline-4
Grade typePerformance
IncludesMain Bearings
Max wall thickness0.0793 in
Oil clearanceStandard
Shaft diameter1.9661 in
TypeCrankshaft Main Bearing Set
Min std tunnel size2.1259" (53.998mm)
Max overall length0.6941" (17.63mm
Min std shaft size1.9661" (49.938mm)
Oil controlOptimized lubrication and oil film stability
Interchange number1986-2005 Mazda 323, Miata, MX-3, Protegé, Mercury Capri, Kia, Rio, and Kia Sephia L4 engine bearing, applications for B6 and BP 1.6L / 1.8L platforms, +0.25, oversize main bearing set.
Max wall at crown0.0793" (2.013mm)
ApplicationPerformance rebuilds, OEM refresh, high-RPM use

Shipping and returns

Shipping. Free on every order, US only. Orders arrive in 2–4 days.

Returns. 30-day returns, except in extreme cases.

Support. Our team is available 24/7 for fitment mismatches or any other reason.

Warranty. Full manufacturer guarantee.

ACL Performance Main Bearing Set For Mazda B6 BP 1.6L 1.8L +0.25 Oversize
ACL Performance Main Bearing Set For Mazda B6 BP 1.6L 1.8L +0.25 Oversize
$101.99
In stock · free shipping

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