My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Sierra 18-8502 Exhaust Manifold Mounting Kit for OMC GM Small Block V8

Manufacturer

Picture for manufacturer Sierra

Part Number

18-8502
12 reviews
Sale Price

$71.97

In Stock (9)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-8502 Exhaust Manifold Mounting Kit is a precision-engineered hardware solution designed for OMC GM Small Block V8 engines with 305-350 cubic inch displacement. This comprehensive mounting kit provides all the necessary components to properly secure exhaust manifolds on OMC sterndrives and compatible Volvo Penta applications.

Key Features:

  • Designed for OMC GM Small Block V8 305-350 cu. in. engines (1979-1989)
  • Compatible with OMC/Volvo GM Small Block configurations
  • Works with Sierra manifolds 18-1902 (starboard) and 18-1903 (port)
  • Replaces Mallory and Osco OEM mounting hardware
  • Meets or exceeds original equipment specifications
  • High-quality construction for reliable marine engine performance

This mounting kit is essential when replacing or servicing exhaust manifolds on compatible marine engines. Sierra marine engine parts are manufactured to OEM standards, ensuring proper fit and long-lasting durability in harsh marine environments. Use with Sierra 18-2949 exhaust manifold gasket for complete installation.

Applications: OMC Sterndrive/Cobra, Volvo Penta AQ-series (200, 225, 255, 260, 290), and compatible GM small block marine engines.

easy site to use

Good

Decent shipping and definetly the lowest prices. Found a new grille for my truck 50 dollars lower than any other website.

Fast , Smooth transaction

Easy to use site; and easily find products and product details.

I have searched the internet for the best pricing on auto accessories and ended up at Autoplicity. I tried everything to negotiate prices with some supplies and still got the best pricing usins Autoplicity without any hassles or delays. My invoice number 9314 shows that I got a great deal thanks to Autoplicity. I will be a returning customer for my future purchases.

Awesome price! Shipping could be faster, but it was fast enough. Will deff buy again.

Easy transaction

Prices are very good. There was a slight issue with my order, but it was taken care of after being passed around to a few different departments when I called. Would order from them again.

The best!

Excellent price and quick delivery made my first purchase a great one. Will for sure be checking out Autoplicity for any future buys.

Cheap price

Share icon
Return Policy
Returns are easy at Autoplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy