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Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
⚠️ California Proposition 65 Warning : Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
Sierra'S 18-1903 Manifold Is Designed For Use In Gm Small Block V8 (305-350 Cid) (1979-1989) Engines. Designed For Installation On The Port Side. Use With Sierra'S 18-1921 Manifold Elbow, 18-2949 Exhaust Manifold Gasket, 18-8502 Exhaust Manifold Mounting Kit, 18-2902-1 Exhaust Manifold Gasket, And 18-2902-1-9 Exhaust Manifold Gasket. The Manifold Comes With (1) Sierra 18-0943-2 Exhaust Elbow Gasket, (1) Sierra 18-2949 Exhaust Manifold Gasket, (1) Sierra 18-7306 Hose Clamp, And (1) Sierra 18-0550 Plug Off Cap. Interchangeable With Mallory 9-40601, Glm 51420, Barr Omc-1-912442, Osco 2442, And Omc Stern Drive 912442. Check Manufacturer Recommendations To Ensure A Proper Fit Before Purchasing. Each Sierra Product Meets Or Exceeds The Original Equipment Part It Replaces.
Yes, we offer free standard shipping on all orders within the United States.
When will I receive my item?
Domestic orders typically arrive within 3-5 business days. Delivery times are estimated and may vary depending on your location, weather conditions, or other unforeseen factors.
Can I change or return my item?
We hope you love your purchase, but if you need to make a change or return your item, we’ve got you covered! You can initiate a return or exchange within 30 days of receiving your order. Please ensure the product is in its original condition and packaging. For more information on our return policy, please visit our Returns & Exchanges page.
Frequently Asked Questions
Q: What are the dimensions of the Sierra International 18-1903 manifold?A: The dimensions of the Sierra International 18-1903 manifold are approximately zero point thirty-nine inches in length, width, and height.
Q: What material is the Sierra International 18-1903 manifold made from?A: The specific material composition of the Sierra International 18-1903 manifold is not listed, but it is designed for durability and performance.
Q: Is the Sierra International 18-1903 manifold compatible with other parts?A: Yes, the manifold is compatible with Sierra's 18-1921 manifold elbow and other specified exhaust gaskets and mounting kits.
Q: How do I install the Sierra International 18-1903 manifold?A: To install the manifold, follow the manufacturer's instructions and ensure compatibility with your GM Small Block V8 engine.
Q: Is this manifold suitable for my GM engine?A: Yes, it is designed for GM Small Block V8 engines from one thousand nine hundred seventy-nine to one thousand nine hundred eighty-nine.
Q: Can I use this manifold on either side of the engine?A: No, the Sierra International 18-1903 manifold is specifically designed for installation on the port side of the engine.
Q: How do I maintain the Sierra International 18-1903 manifold?A: Regularly inspect the manifold for leaks and ensure all gaskets and mounting kits are in good condition to maintain performance.
Q: Is the Sierra International 18-1903 manifold hazardous?A: No, the Sierra International 18-1903 manifold is not classified as a hazardous material.
Q: What is the warranty coverage for this product?A: All Sierra parts, including the eighteen thousand one hundred ninety-three manifold, are covered under Sierra's industry-leading customer satisfaction warranty.
Q: What if my Sierra International 18-1903 manifold arrives damaged?A: If the manifold arrives damaged, contact the seller immediately to initiate the return process or request a replacement.
Q: Is the Sierra International 18-1903 manifold a universal fit?A: Yes, the manifold features a universal fit for GM Small Block V8 engines.
Q: How do I store the Sierra International 18-1903 manifold when not in use?A: Store the manifold in a dry, cool place to prevent corrosion and damage.
Q: Can I return the Sierra International 18-1903 manifold if it doesn't fit?A: Yes, you can return the manifold if it does not fit your engine, provided it is within the return policy timeframe.
Q: Are there any specific installation tools required?A: Yes, installation requires standard automotive tools, including sockets and wrenches, for proper fitting.
Q: Is there a specific torque specification for installation?A: Yes, refer to the manufacturer's instructions for torque specifications during installation to ensure a proper fit.