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Sierra 18-1933 Marine Exhaust Manifold Port Side GM Small Block V8

Manufacturer

Picture for manufacturer Sierra

Part Number

18-1933
13 reviews
Sale Price

$364.03

2 left at this price

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Sierra 18-1933 is a port-side replacement exhaust manifold engineered for Crusader GM Small Block V8 305–351 cubic inch marine engines. Manufactured as a direct OEM replacement, this manifold is fully interchangeable with the original equipment it is designed to replace, ensuring a precise fit and restoring engine performance to factory specifications.

Key Features:

  • Port-side exhaust manifold for Crusader GM Small Block V8 305–351 ci applications
  • Leak tested from the factory for quality assurance before packaging
  • CNC-machined mating surfaces provide an optimal seal without additional surface preparation
  • Primed and painted casting engineered to resist corrosion in both fresh and saltwater marine environments
  • Direct OEM replacement — fully interchangeable with original equipment parts
  • Backed by Sierra's comprehensive warranty

Interchangeable OEM Cross-References:

  • Barr: CR-1-97993
  • Crusader: 97993, 97115
  • Mallory: 9-40402
  • Osco: 7993

Recommended Use With:

  • Exhaust Manifold Gasket: Sierra 18-0418
  • Mounting Kit: Sierra 18-8524

Constant heat cycling and prolonged exposure to water causes marine exhaust components to corrode faster than other engine parts. Sierra manifolds are engineered for quick, out-of-the-box installation, so you can get back on the water with confidence.

Quick shipping on my order. Thanks

The order was easy and shipment was fast.They had what i was looking for at a great price.

Easy to use website.

Quick and easy and nice to have option to use Amazon and Paypal for payment

Good selection, easy installation. The only problem was the stake pocket bolts for my 2015 F150 had to be modified. They were too long. Not sure why. I was positive that I selected that year when I ordered.

Great

Awesome

Excellent seller, super fast shipping and best pricing on the internet. Thank You!!!!!!

I am very satisfied with my experience

Fast shipping even around the holidays and the cheapest price I could find on my Thule t2 bike rack I would buy here again

I am extremely satisfied with Autoplicity in terms of service, price, and shipping. I was shopping for a set of N-FAB step bars for my truck and was ready to purchase from Amazon when I decided to look around to see if there were better prices. I stumbled upon Autoplicity and was surprised to see their price on the bars. I checked with their online chat customer service to confirm that they would fit my truck and that the price was for a pair of the bars and not just one. (That's how low the price was!). I then placed my order and the bars arrived at my doorstep 3 days later! Autoplicity gets an A+ in my book and I'll definitely be coming back.

The whole process was some and quick. They also had the lowest prices available. Will be using them more often for sure!!

great prices

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