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Charts & Guides for Part Number SUM-680139-NM
Summit Racing™ Header-Back Dual Exhaust Systems for 1970-1974 BARRACUDA, CHALLENGER, CUDA - SUM-680139-NM
Part Number: SUM-680139-NM
Summit Racing™ Header-Back Dual Exhaust Systems
Exhaust System, Header-Back, 2.50 inch, Split Rear, Steel, Aluminized, Dodge, Plymouth, E-Body, V8, Kit
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Estimated Ship Date: Dec 16, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
SUM-680139-NM
Part Type:
Product Line:
Summit Racing Part Number:
SUM-680139-NM
UPC:
190861034242
System Material:
Steel
System Style:
Header-back
Exhaust Type:
Dual
Exit Location:
Split rear
System Finish:
Aluminized
Catalytic Converter(s) Included:
No
Intermediate Pipe Diameter (in.):
2.50 in.
Muffler Included:
No
Hardware Included:
Yes
Tailpipe Diameter (in.):
2.50 in.
Tip Included:
No
Remanufactured:
No
Quantity:
Sold as a kit.
Notes:
Designed to fit Dynomax exhaust headers with 3.00 in. collectors only. Mufflers not included. Designed to be used with offset inlet and center outlet mufflers, approximate size of 14 in. x 9 in. x 4 in.
Special Attention:
It is illegal to install parts or components that bypass, defeat, or render inoperative the manufacturers’ technology and design necessary to reduce vehicle emissions to meet state and federal Clean Air Act standards.
Summit Racing™ Header-Back Dual Exhaust Systems
Get the most from your high performance mods with these Summit Racing™ dual exhaust systems for header-equipped passenger cars. The systems feature aluminized or 409 stainless steel tubing that is mandrel-bent for high exhaust flow, increased horsepower, and reduced backpressure. These header-back exhausts are available in dozens of configurations for proper fitment on a wide range of vehicles, both manual and automatic. Your options include material, finish, exit location, and pipe diameter. Feel the power when you're equipped with a Summit Racing™ dual exhaust system!
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Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
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