1978 Mercury Marquis Emission Control Parts
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Standard®PCV ValveMercury Marquis 1978, PCV Valve by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to all...Made with precision and quality in mindDesigned to meet your specific needs$4.32 - $4.41 - Gates®Breather CapMercury Marquis 1978, Breather Cap by Gates®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will meet your needs...High quality at an affordable priceExpertly made from premium materials$8.11
- WVE®PCV ValveMercury Marquis 1978, PCV Valve by WVE®. WVE emissions products are made to meet or exceed vehicle manufacturer specifications to work in concert with the fuel system, underhood electronics and the engine to minimize emissions of...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$4.55
- Standard®EGR ValveMercury Marquis 1978, EGR Valve by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to all...Polyester-reinforced silicone diaphragm resists thermal aging in temperatures up to 200°CInjection-molded high-temperature polymer prevents temperature-releated failures$65.06 - $79.55
- Stant®Breather CapMercury Marquis 1978, Breather Cap by Stant®. This cap is designed to keep dirt and debris from entering the engine while allowing the crankcase ventilation that is so critical for proper engine performance and to prevent leaks....Enables crankcase ventilationPrevents dirt and debris from entering engine$5.47
- Motorcraft®PCV Breather ElementMercury Marquis 5.8L / 6.6L 1978, PCV Breather Element by Motorcraft®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in...Built to strict Ford Motor Company specificationsRecommended by Ford Motor Company$4.84
- WIX®PCV Breather ElementMercury Marquis 1978, PCV Breather Element by WIX®. Wix Breather Filters remove chemical contaminants and particulate matter from the crankcase. They are made of pleated paper and connected to the breather tube. These filters also trap...Low air flow restrictionIncludes a pleated paper filter$5.77 - $6.23
- WVE®Catalytic Converter Mounted Secondary Air Injection Pump Check ValveMercury Marquis 1978, Catalytic Converter Mounted Secondary Air Injection Pump Check Valve by WVE®. WVE emissions products are made to meet or exceed vehicle manufacturer specifications to work in concert with the fuel system, underhood...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$19.61 - $40.61
- Standard®Engine Crankcase Breather ElementMercury Marquis 7.5L 1978, Engine Crankcase Breather Element by Standard®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of...Made with precision and quality in mindDesigned to meet your specific needs$8.61
- Standard®Secondary Air Injection Pump Check ValveMercury Marquis 1978, Secondary Air Injection Pump Check Valve by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest...Made with precision and quality in mindDesigned to meet your specific needs$34.96
- Standard®EGR Valve GasketMercury Marquis 1978, EGR Valve Gasket by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity...Made with precision and quality in mindDesigned to meet your specific needs$1.72 - $29.28
- Dorman®Help™ PCV Valve GrommetMercury Marquis 1978, Help™ PCV Valve Grommet by Dorman®. This PCV valve grommet is designed to match the fit and function of the original grommet on specified vehicles, and is engineered for durability and reliable performance.Direct replacement - this PCV valve grommet is designed to match the fit and function of the original grommet on specified vehiclesRestores functionality - this grommet is made to fit and fully restore part functionality after the original grommet fails$2.73 - $3.08
- Dorman®Help™ PCV Valve ElbowMercury Marquis 1978, Help™ PCV Valve Elbow by Dorman®. Location: Hose to Oil Filler. This PCV valve elbow is designed to match the fit and function of the original elbow on specified vehicles, and is engineered for durability and...Direct replacement - this PCV valve elbow is designed to match the fit and function of the original elbow on specified vehiclesRestores functionality - reliable replacement for an original elbow that is leaking or has failed due to heat and fatigue$3.37
- WVE®PCV Valve GrommetMercury Marquis 1978, PCV Valve Grommet by WVE®. WVE emissions products are made to meet or exceed vehicle manufacturer specifications to work in concert with the fuel system, underhood electronics and the engine to minimize emissions...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$5.68
- ACDelco®Gold™ PCV Valve ElbowMercury Marquis 1978, Gold™ PCV Valve Elbow by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...High quality plastic and/or steel constructionDirect replacement for a proper fit every time$9.34Save: $1.39 (15%)$7.95
- Standard®PCV Valve ElbowMercury Marquis 1978, PCV Valve Elbow by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to...Made with precision and quality in mindDesigned to meet your specific needs$3.50
- WVE®EGR Valve GasketMercury Marquis 1978, EGR Valve Gasket by WVE®. WVE emissions products are made to meet or exceed vehicle manufacturer specifications to work in concert with the fuel system, underhood electronics and the engine to minimize emissions of...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$3.76 - $12.41
- Fel-Pro®EGR Valve GasketMercury Marquis 1978, EGR Valve Gasket by Fel-Pro®. If you need durable gaskets to prevent leaks on your vehicle, Fel-Pro is the way to go. Engineered using the latest technologies and global engineering resources, the gaskets meet...Direct OEM replacement for a proper fitEnsures reliable sealing performance$1.83
- Apex Auto®EGR Valve GasketMercury Marquis 5.8L Windsor Engine 1978, EGR Valve Gasket by Apex Auto®. Designed utilizing the latest technology, this product by Apex Auto features premium quality and will perform better than advertised. Perfect for your vehicle and...Quick accurate delivery with excellent fill-rateExcellent inventory availability$1.63
- MagnaFlow®Standard Universal Fit Round Body Catalytic ConverterMercury Marquis 5.8L 1978, Standard Catalytic Converter by MagnaFlow®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter: 2.25". Catalytic...$97.00
- Walker®CalCat™ Universal Fit Round Body Catalytic ConverterMercury Marquis 5.8L 1978, CalCat™ Catalytic Converter by Walker®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. With 1 Inlet. Without Air Tube. Without O2 Sensor Port. Catalytic Converter Overall...$558.51
- AP Exhaust®Standard Duty Universal Fit Round Body Catalytic ConverterMercury Marquis 5.8L 1978, Standard Duty Catalytic Converter by AP Exhaust®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter: 2"....$80.78
- CATCO®Pre-OBDII Universal Fit Round Body Standard Duty Catalytic ConverterMercury Marquis 5.8L with California Emission / Federal Emission 1978, Pre-OBDII Standard Duty Catalytic Converter by CATCO®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. Without Air Tube. Without O2...$143.15
- Walker®Ultra™ Universal Fit Round Body Catalytic ConverterMercury Marquis 5.8L 1978, Ultra™ Catalytic Converter by Walker®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. With 1 Inlet. Without Air Tube. Without O2 Sensor Port. Catalytic Converter Overall...$114.35
- Big End Performance®PCV Breather CapPCV Breather Cap by Big End Performance®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great...$12.39 - $15.76
- Big End Performance®Clamp On PCV BreatherClamp On PCV Breather by Big End Performance®. This Big End Performance product is just the option for you in case you want to get the most out of your auto. It is made from first-rate materials to provide the highest level of quality....High quality at an affordable priceExpertly made from premium materials$16.27 - $18.98
- Edelbrock®Victor Series Race Style PCV BreatherVictor Series Race Style PCV Breather by Edelbrock®. Designed utilizing the latest technology, this product by Edelbrock features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$44.95
- Granatelli Motor Sports®Valve Cover BreatherValve Cover Breather by Granatelli Motor Sports®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will meet your...Made with precision and quality in mindDesigned to meet your specific needs$15.96
- Granatelli Motor Sports®Valve Cover Breather InsertValve Cover Breather Insert by Granatelli Motor Sports®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will meet...Made with precision and quality in mindDesigned to meet your specific needs$50.69 - $67.83
- Dorman®OE Solutions™ Oxygen Sensor Bung Repair KitOE Solutions™ Oxygen Sensor Bung Repair Kit by Dorman®. Why replace an exhaust pipe because of a corroded, stripped or damaged oxygen sensor bung? Save the pipe and replace the bung with this weld-on replacement. Standard O2 sensor...Repair-friendly solution - this oxygen sensor bung allows replacement of a damaged fitting without replacing the entire exhaust componentUniversal fitment - designed to accommodate standard oxygen sensor threads$9.61 - $11.46
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1978 Mercury Marquis Models
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