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Flowmaster 17149 American Thunder Crossmember-Back Dual Exhaust System

(1970-1974 Chevrolet Camaro; 1970-1974 Pontiac Firebird)

Part of: Flowmaster American Thunder Crossmember-Back Dual Exhaust System

Other options in this family: Flowmaster 817654 Flowmaster 17201 Flowmaster 817200 Flowmaster 817174 Flowmaster 17282

Manufacturer

Picture for manufacturer Flowmaster

Part Number

17149
12 reviews
Sale Price

$949.95

3 left at this price

delivery box

Usually delivered within 2 days

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Product Details

The Flowmaster American Thunder Crossmember-Back Exhaust System is a true dual exhaust solution engineered for performance enthusiasts seeking maximum power gains and an aggressive exhaust tone. This complete cat-back system features mandrel-bent 16-gauge aluminized steel tubing that maintains consistent diameter through every bend, ensuring optimal exhaust flow and minimizing back pressure.

Key Features:

  • True dual crossmember-back exhaust configuration for balanced exhaust flow
  • Specially designed Slimline 50 Series mufflers provide maximum ground clearance without sacrificing performance
  • H-pipe crossover design balances exhaust pulses for maximum power output and deep, resonant tone
  • Mandrel-bent 16-gauge aluminized steel construction resists corrosion and ensures long-term durability
  • 2.50-inch polished 304 stainless steel exhaust tips deliver a premium finished appearance
  • Complete installation kit includes all necessary hangers and mounting hardware
  • Moderate to aggressive exterior sound level provides sporty exhaust note without drone

This system connects at the factory crossmember location and does not include header reducers or factory manifold downpipes. The Slimline 50 Series mufflers are specifically designed with a compact profile to provide maximum ground clearance for lowered vehicles or challenging undercarriage environments while delivering Flowmaster's signature performance sound.

Products specifications

Fits

1970-1974 Chevrolet Camaro; 1970-1974 Pontiac Firebird

Tip Diameter

2.500 in.

Outlet Outside Diameter

2.500 in.

Prop 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

California Proposition 65 Chemical Name 2

Chromium (hexavalent compounds)

California Proposition 65 Chemical Name 1

Nickel (metallic)

California Proposition 65 Chemical Name

Chromium (hexavalent compounds)

California Proposition 65 Chemical Name

Nickel (Metallic)

System Type

Header Back

Heat Shield Attached

No

Material

Aluminized Steel

Tubing Diameter

2.500 in.

Outlet Diameter

2.500 in.

Muffler Count

2

Exit Position

Dual Rear

Tip Quantity

2

Tail Pipe Diameter

2.500 in.

Exhaust Type

Dual

Single or Dual

Dual

Title

Flowmaster 17149 Header-back System - Dual Rear Exit - American Thunder - Moderate/Aggressive

Brand

Flowmaster

Catalytic Converter Quantity

0

Category

Exhaust

Clamping Type

U-Bolt

Clamps Included

Yes

Drive

2WD

Emission Code

5

Exhaust Series

American Thunder

Exhaust Tip Connection

Welded

Exhaust Tip Cut

Angled

Exhaust Tip Edge

Slash Cut

Exhaust Tip Finish

Polished

Exhaust Tip Intercooled

No

Exhaust Tip Material

304 Stainless Steel

Exhaust Tip Quantity

2

Exhaust Tip Resonated

No

Exhaust Tip Shape

Round

Exhaust Tip Wall

Single Wall

Exit Style

Dual Out Rear

Finish

Aluminized

Gasket Or Seal Included

No

Grade Type

Performance

Hangers Included

Yes

Heat Shield Included

No

Inlet Diameter

2.50

Inlet Type

Weld-On

Mounting Bracket Included

Yes

Muffler (Left) Type

Chambered

Muffler (Right) Type

Chambered

Muffler Body Material

Aluminized Steel

Muffler Body Shape

Oval

Muffler Finish

Black High-Temperature Paint Finish

Muffler Flanged Inlet

No

Muffler Flanged Outlet

No

Muffler Inlet Connection

Slip-Fit

Muffler Outlet Connection

Slip-Fit

Muffler Outlet Quantity

1

muffler part number

932556

Muffler Quantity

2

Muffler Series

50 Series Delta Flow

Muffler Type

Chambered

Pipe Color

Silver

Pipe Material

Aluminized Steel

Product Type

Exhaust System

Sound Level

Aggressive / Moderate

Spring Bolt Kit Included

No

Sub Category

Exhaust and Tail Pipes

Tail Pipe Quantity

Dual

Tail Pipe Quantity

2

Tail Pipe Tapered Outlet

No

Type

Crossmember-Back

Valve Included

No

Valve Type

Not Applicable

Warning

California Proposition 65

first time buyer

Shopping went well. Good price.

Could not complete order with Visa which was weird. We use it almost every day? But opened Pay Pal account and Visa went right through?

Great service and products for the price. Searched for the part all over and autoplicity beat every one else price. Very fast shipping.

Was fast and simple to search and order my part

Love the product and it arrived quickly. Everything was great except the shipping - which I know you can't help. The box was badly damaged when it arrived and I was nervous that I would have to return it. Thankfully the product was undamaged. The instructions and keys were halfway hanging outside of the shipping box and could have very easily been lost. Not sure how to remedy reckless delivery personnel.

Thank You for having a part I could not find!

2nd order from you and always arrived fast.

Very Easy qnd quick ordering

Looks like just the part I needed. No hastle, easy to find

Great Site, shopping was easy and fast.

Completely amazed by this seller. I recieved the rack in just 2 days and the price was unbeatable. I'm just stoked to have finally found a bike rack worth having!!

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