Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededFLOWMASTERPART NUMBER: 389-817158
American Thunder Header-Back Exhaust System 1968-1974 Chevy Nova V8
$94995
1 left in stock
Ships on Sep 08, 2026
Lowest Price GuaranteeChevy II/Nova
American Thunder Header-Back Exhaust System1968-1974 Chevy Nova V8 2.5" Tubing Tips Not Included Dual Rear Exit Super 44 Series Muffler 409S Stainless Steel
FLOWMASTER MUFFLERS 817158 Features:
For the person who is looking for a true dual crossmember-back exhaust system with an moderate to aggressive exhaust tone. With an easy fit in mind, these systems are constructed from 16-gauge 2.50-inch mandrel-bent stainless steel tubing with a built-in H-pipe crossover, a pair of specially selected Super 44 Series performance mufflers and includes all hangers and hardware necessary for installation. The tailpipes exit in the factory location behind the rear wheels. The exhaust system delivers an aggressive to moderate exterior sound tone with a moderate interior tone and is best suited for the enthusiast who wants their performance to be heard. Like all Flowmaster exhaust systems, the benefits include improved throttle response, power and mileage. Covered by our Lifetime Limited Warranty.- Super 44 Series Performance Mufflers for Deep Powerful Sound
- Crossmember-back True Dual 2.50-inch Exhaust System
- Includes Hangers and Hardware for Installation
- Mandrel-bent 16-gauge Stainless Steel Tubing
- Aggressive to Moderate Exterior Exhaust Tone
- Does Not Include Header Reducer Cones or Downpipes for Factory Manifolds
- H-pipe Crossover for Maximum Power
- Lifetime Limited Warranty
Part TypeExhaust System
BrandFLOWMASTER
Package Height14.0
Package Width24.75
Package Length48.5
Weight70.2 PG
Tailpipe Diameter (In.)2.5
Muffler Inlet Inside Diameter2.50 in.
Hangers IncludedYes
Main Piping Diameter2.50 in.
Tail Pipe QuantityDual
Inlet TypeWeld-On
Catalytic Converter Quantity0
Exit LocationSplit Rear
Inlet QuantityTwo
Muffler Body Length13 in.
Sound LevelAggressive / Moderate
Muffler MaterialStainless steel
Muffler Body Material409 Stainless Steel
Gasket Or Seal IncludedNo
Pipe ColorSilver
System FinishNatural
Muffler Quantity2
Muffler Inlet Outside Diameter2.63 in.
Exit QuantityTwo
Muffler Flanged OutletNo
Exhaust TypeDual
Catalytic Converter IncludedNo
Heat Shield IncludedNo
Part CategoryPerformance Parts
Hardware IncludedYes
Exhaust Tip Quantity0
Valve IncludedNo
Muffler TypeChambered
Pipe Material409 Stainless Steel
Muffler Body Width9.50 in.
Tail Pipe Tapered OutletNo
Muffler Body ShapeOval
Mounting Bracket IncludedYes
Muffler Outlet Quantity1
Muffler FinishBlack High-Temperature Paint Finish
Inlet Diameter2.50 in.
Clamps IncludedYes
Muffler StyleChambered
FinishNatural
Exit StyleDual Out Rear
Muffler Body Height4 in.
Tip IncludedNo
Clamping TypeFlat Band
Muffler Flanged InletNo
Spring Bolt Kit IncludedNo
Muffler SeriesSuper 44 Series
QuantitySold as a kit
Muffler IncludedYes
Exhaust Tip ConnectionClamp-On
System StyleHeader-back
Tail Pipe Outlet Outside Diameter2.50 in.
Muffler ConfigurationSingle inlet/Single outlet
System MaterialStainless steel
Valve TypeNot Applicable
Intermediate Pipe Diameter2.5 in (63.5 mm)
Part FitmentSemi Universal
Vendor Part Number817158
Package Qty1
Package TypeEA
No Questions
No Reviews
Items You Need
![Industrial Nitrile Gloves [5.5 mils Thick, Medium]](https://www.jegs.com/images/mini_200/500/555/555-1126.jpg)
JEGS
Industrial Nitrile Gloves [5.5 mils Thick, Medium]
Part Number : 555-1126
$1599$17.99
You Save$2.00
![Industrial Nitrile Gloves [5.5 mils Thick, X-Large]](https://www.jegs.com/images/mini_200/500/555/555-1128.jpg)
JEGS
Industrial Nitrile Gloves [5.5 mils Thick, X-Large]
Part Number : 555-1128
$1599$17.99
You Save$2.00
![Industrial Nitrile Gloves [5.5 mils Thick, Large]](https://www.jegs.com/images/mini_200/500/555/555-1127.jpg)
JEGS
Part Number : 555-1126
$1599$17.99
You Save$2.00
JEGS
Part Number : 555-1128
$1599$17.99
You Save$2.00
EASY KITS
Some parts are not legal for use in California or other states with similar laws / regulations
