1978 Pontiac Grand Prix Exhaust Systems
Select Your Submodel
-
MagnaFlow®Pre-OBDII Direct Fit Oval Body Catalytic ConverterPontiac Grand Prix with PRE-OBDII Standard 1978, Pre-OBDII Catalytic Converter by MagnaFlow®. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Oval. With 1 Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter:...$913.00 - ATP®Cast Iron Natural Exhaust ManifoldPontiac Grand Prix 5.0L with 2-Stud Dump Flange 1978, Natural Cast Iron Exhaust Manifold by ATP®. Position: Passenger Side. Color: Natural. Header Coating: Uncoated. ATP Graywerks Exhaust Manifolds are a high quality OE replacement...Manufactured to OE design ensuring manifold will line up and flow like the original unitHigh grade metallurgy resists fatigue cracking and breakage$212.89
- Walker®SoundFX™ Steel Oval Direct-Fit Aluminized Exhaust MufflerPontiac Grand Prix 4.9L / 5.0L 1978, SoundFX™ Steel Oval Direct-Fit Aluminized Exhaust Muffler by Walker®. Optional. Muffler Inlet Diameter: 2". Muffler Outlet Diameter: 2". Muffler Configuration: Offset - Centered. This muffler is...Designed to deliver ultimate performance and pleasing sound qualityOE-equivalent direct-fit design$45.49 - $49.79
- Davico®Exhaust Manifold with Integrated Catalytic ConverterPontiac Grand Prix 4.9L / 5.0L 1978, Exhaust Manifold with Integrated Catalytic Converter by Davico®. This product by Davico will be a great solution to replace your failed or damaged catalytic converter. Once your stock cat fails to...Helps your vehicle emit harmless gasesDirect OEM replacement$410.45 - $470.33
- Walker®Replacement Exhaust KitPontiac Grand Prix 1978, Replacement Exhaust Kit by Walker®. If you are looking for the ultimate in quality and value, then this superior replacement exhaust kit by Walker is what you need. All its components are designed with precision...Mufflers and Resonators Designed for OE equivalent sound and precision fitOE-style louvered tube technology for a premium, factory-like sound$45.49 - $377.86
- MagnaFlow®Pre-OBDII Universal Fit Round Body Catalytic ConverterPontiac Grand Prix with PRE-OBDII Standard 1978, Pre-OBDII Catalytic Converter by MagnaFlow®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. Without Air Tube. Without O2 Sensor Port. OE Spec. If your car...$560.00
- MagnaFlow®Standard Universal Fit Oval Body Catalytic ConverterPontiac Grand Prix 1978, Standard Catalytic Converter by MagnaFlow®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. Without Air Tube. Without O2 Sensor Port. Catalytic Converter Overall Length: 16". If...$119.00
- Pypes®409 SS Exhaust System with Split Rear ExitPontiac Grand Prix 1978, 409 SS Exhaust System with Split Rear Exit by Pypes®. Exhaust Tubing Material: 409 SS. Get a lot of bang for your performance buck with this rewarding exhaust system by Pypes Exhaust. It's a perfect way to beef...$470.75 - $1,246.75Save: up to 8%$430.75 - $1,206.75
- Pypes®409 SS Header-Back Exhaust System with Split Side ExitPontiac Grand Prix 1978, 409 SS Header-Back Exhaust System with Split Side Exit by Pypes®. With X-Pipe. Comes with catalytic converters. With 2.5" Intermediate and Tail Pipe. Exhaust System Type: Header-Back. Exhaust Tubing Material:...$948.75 - $1,087.75Save: 4%$908.75 - $1,047.75
- Hedman Hedders®Standard Duty Mid-Length Tube Racing Exhaust HeadersPontiac Grand Prix with Air Conditioning, Power Steering 1978, Standard Duty Mid-Length Tube Racing Exhaust Headers by Hedman Hedders®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 3". Color: Silver. Header Style:...Made of High Quality MaterialsBuilt to Last$268.16 - $889.09
- Walker®SoundFX™ Steel Oval Aluminized Exhaust MufflerPontiac Grand Prix 4.9L / 5.0L 1978, SoundFX™ Steel Oval Aluminized Exhaust Muffler by Walker®. Optional. Muffler Inlet Diameter: 2". Muffler Outlet Diameter: 2". Muffler Body Length: 19". Muffler Overall Length: 23.75". Muffler...Designed to deliver ultimate performance and pleasing sound quality100% aluminized material$46.81
- MagnaFlow®Standard Direct Fit Catalytic ConverterPontiac Grand Prix 1978, Standard Catalytic Converter by MagnaFlow®. Converter Configuration: Direct Fit. With Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter: 2.5". Catalytic Outlet Diameter: 2.5". Catalytic Converter...$166.00
- Walker®CalCat™ Universal Fit Catalytic ConverterPontiac Grand Prix 1978, CalCat™ Catalytic Converter by Walker®. Converter Configuration: Universal Fit. Without O2 Sensor Port. Catalytic Converter Overall Length: 13.25". Specifically designed to comply with the California Air...$377.86 - $513.19
- AP Exhaust®Standard Duty Universal Fit Oval Body Catalytic ConverterPontiac Grand Prix 4.9L / 5.0L 1978, Standard Duty Catalytic Converter by AP Exhaust®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter:...$82.40
- iD Select®Standard Universal Fit Oval Body Catalytic ConverterPontiac Grand Prix 3.8L 1978, Standard Catalytic Converter by iD Select®. Converter Configuration: Universal Fit. Location: Undercar. Catalytic Converter Body Shape: Oval. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet...$72.47
- CATCO®Pre-OBDII Universal Fit Oval Body Standard Duty Catalytic ConverterPontiac Grand Prix 4.9L / 5.0L with California Emission / Federal Emission 1978, Pre-OBDII Standard Duty Catalytic Converter by CATCO®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. Without Air Tube....$155.76
- ARP®Header Bolt KitPontiac Grand Prix 5.0L 1978, Header Bolt Kit by ARP®. ARP manufactures a variety of premium grade bolt and stud kits to facilitate installation of exhaust headers including the popular stainless stud kit with 12-point nuts. The...Designed to unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability$21.63 - $119.06
- BRExhaust®Replacement Exhaust KitPontiac Grand Prix 4.9L / 5.0L 1978, Replacement Exhaust Kit by BRExhaust®. Get confidence with this high-standard OE quality purchase which is perfect for those who want to perform a long-lasting exhaust system repair. Made from...Superior replacement for your worn out exhaust partHelps put your vehicle back to its tip-top shape$41.37 - $91.87
- Hedman Hedders®Standard Duty Mild Steel Long Tube Exhaust HeadersPontiac Grand Prix with Air Conditioning, Power Steering 1978, Standard Duty Mild Steel Long Tube Exhaust Headers by Hedman Hedders®. Primary Tubing Diameter: 1.5". Color: Silver. Header Style: Long Tube. The standard-duty Hedman...Made of High Quality MaterialsBuilt to Last$328.43 - $745.71
- Walker®Ultra™ Universal Fit Small Oval Body Catalytic ConverterPontiac Grand Prix 4.9L / 5.0L 1978, Ultra™ Catalytic Converter by Walker®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Small Oval. With 1 Inlet. With Air Tube. Without O2 Sensor Port. Catalytic Converter...$129.20
- Eastern Catalytic®Standard Universal Fit Oval Body Catalytic ConverterPontiac Grand Prix 3.8L 1978, Standard Catalytic Converter by Eastern Catalytic®. Converter Configuration: Universal Fit. Location: Undercar. Catalytic Converter Body Shape: Oval. Without Air Tube. Without O2 Sensor Port. Catalytic...$119.88
- Stage 8®Header Locking Bolt KitPontiac Grand Prix 1978, Header Locking Bolt Kit by Stage 8®. Stage 8 locking fastener solutions are fail-safe when used and installed as directed. They are removable and reusable and can be visually inspected; if the locking retainer...Thoughtfully designed for the highest efficiency and safetyWill provide more breakaway torque than any other locking system$68.22 - $75.82
- Hedman Hedders®Elite Ultra-Duty Mild Steel Silver Matte Ceramic-Metallic Exhaust HeadersPontiac Grand Prix Base 4.9L / 5.0L with Air Conditioning, Power Steering, Gen 1 SB Chevy Engine, Automatic Transmission Column Shifter / Automatic Transmission Floor Shifter 1978, Elite Ultra-Duty Silver Matte Ceramic-Metallic Mild...Made of High Quality MaterialsIdeal for Heavy Duty Applications$688.98 - $800.97
- Hedman Hedders®Elite Ultra-Duty Mild Steel Silver Matte Ceramic-Metallic Racing Exhaust HeadersPontiac Grand Prix with Air Conditioning, Power Steering 1978, Elite Ultra-Duty Silver Matte Ceramic-Metallic Mild Steel Racing Exhaust Headers by Hedman Hedders®. Collector Outlet Diameter: 3". Color: Silver. Header Coating: Ceramic....Made of High Quality MaterialsIdeal for Heavy Duty Applications$651.95 - $721.27
- Doug's Headers®4-Tube Hi-Temp Black Coated Mid-Length Tube Exhaust HeadersPontiac Grand Prix 4.9L / 5.0L Transmission 1978, 4-Tube Hi-Temp Black Coated Mid-Length Tube Exhaust Headers by Doug's Headers®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 3". Color: Black. Header Style: Mid-Length...3/8" Thick machined flanges...no warpingCNC mandrel bent tubes... accurate fit & better flow$721.45
- Doug's Headers®4-Tube Short Tube Exhaust HeadersPontiac Grand Prix 1978, 4-Tube Short Tube Exhaust Headers by Doug's Headers®. Header Coating: Ceramic. Header Style: Short Tube. Doug's Headers development and design is complex and requires a substantial amount of time and resources...3/8" Thick machined flanges...no warpingCNC mandrel bent tubes... accurate fit & better flow$735.95 - $897.95
- Doug's Headers®4-Tube Steel Long Tube Exhaust HeadersPontiac Grand Prix 1978, 4-Tube Steel Long Tube Exhaust Headers by Doug's Headers®. Header Style: Long Tube. Doug's headers are carefully developed on the vehicles they are intended to fit and are re-checked numerous times during the...Doug's Headers D3373 Metallic Ceramic Coating3/8" thick flanges$692.45 - $1,029.95
- Patriot Exhaust®Clippster Steel Mid-Length Tube Exhaust HeadersPontiac Grand Prix 5.0L Transmission 1978, Clippster Steel Mid-Length Tube Exhaust Headers by Patriot Exhaust®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 3". Header Style: Mid-Length Tube. Header made from Steel....Mid length or "clippster" headers provide improved ground clearance for popular muscle cars and street rodsDurable 16 and 18 gauge tubing$335.02 - $593.08
- Patriot Exhaust®Exhaust HeadersPontiac Grand Prix 5.0L 1978, Exhaust Headers by Patriot Exhaust®. This superior Patriot Exhaust product is just for you. Carefully designed for maximum performance, is will more than just meet your needs and expectations. This product...Expertly crafted from premium materialsQuality design and workmanship$321.25 - $652.75
- Walker®Aluminized Steel Exhaust Intermediate PipePontiac Grand Prix 4.9L / 5.0L 1978, Aluminized Steel Exhaust Intermediate Pipe by Walker®. Main Piping Diameter: 2". With their extensive selection of accessories and hardware for the exhaust system, Walker will provide you with...Made of high quality aluminized steelCorrosion resistant$22.72
Shop By Service Type
Popular Products
-
- $28.29 - $176.11
1978 Pontiac Grand Prix Exhaust Reviews
5 reviews
I Would Definitely Buy Again
SLP® - Loud Mouth™ Stainless Steel Round Bullet-Type Silver Exhaust Resonator (2.5" Center ID, 2.5" Center OD, 14" Length)Posted by Robert (Monroe, WI) / November 20, 20222000 Dodge Dakota
1978 Pontiac Grand Prix Models
Popular Searches