🌍 We Ship Worldwide Learn more

💵 Afterpay available, shop now, pay later Learn more

💬 Customer Support Click here

Flowmaster  |  SKU: 817390

Flowmaster American Thunder Crossmember-Back Exhaust System - 817390

1968-1970 Mopar B-bodies with V8 engine, 2.5" Stainless Steel - Aggressive to moderate sound

Regular price $2,336.20 NZD + GST
Shipping calculated at checkout.
⚠ Special Order Item — ships direct from supplier. No returns, exchanges, or cancellations once processed. Please allow 7–20 days shipping.

Description

1968-1970 Mopar B-bodies with V8 engine, 2.5" Stainless Steel - Aggressive to moderate sound

Part Number: 817390

The American Thunder system is for the person who is looking for a complete Crossmember-Back dual exhaust system with a deep powerful sound. The system is constructed from 2.50-inch mandrel-bent stainless steel tubing and includes an H-pipe to balance the exhaust pulses and to eliminate back-rap on deceleration. The large cased Super 40 Series performance mufflers generally deliver a moderate interior tone with a deep powerful exterior sound which is suited for enthusiasts who want their performance to be heard. The mandrel-bent tailpipes exit straight out the back under the rear bumper for a strong muscular appearance and allows you to select your own style of tips. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation and is covered by our Lifetime Limited Warranty. .

Features and Benefits

• H-pipe Crossover for Maximum Power and Deep Tone
• Super 40 Series Mufflers for Deep Powerful Sound
• Mandrel-bent 16-gauge Stainless Steel Tubing
• Includes Hangers and Hardware for Installation
• Moderate to Aggressive Exterior Exhaust Tone
• Crossmember-Back True Dual Exhaust System
• Does Not Include Header Reducers or Downpipes for Factory Manifolds
• Lifetime Limited Warranty

Does Not include header reducer cones or downpipes for factor manifolds.

Specifications

  • Specifications
    BrandFlowmaster
    California Proposition 65Yes
    California Proposition 65 Chemical NameNickel (Metallic)
    California Proposition 65 Chemical NameChromium (hexavalent compounds)
    CARB (California) CompliantYes
    Catalytic Converter IncludedNo
    Catalytic Converter Quantity0
    CategoryExhaust
    Clamping TypeFlat Band
    Clamps IncludedYes
    Drive2WD
    Emission Code5
    Exhaust SeriesAmerican Thunder
    Exhaust Tip ConnectionClamp-On
    Exhaust Tip Diameter2.50
    Exhaust Tip QuantitySold Separately
    Exhaust Tip Quantity0
    Exhaust Tip ShapeRound
    Exit StyleDual Out Rear
    FinishNatural
    Gasket Or Seal IncludedNo
    Grade TypePerformance
    Hangers IncludedYes
    Heat Shield IncludedNo
    Inlet Diameter2.50
    Inlet TypeWeld-On
    Main Piping Diameter2.50
    Mount TypeUses New Hangers (Included)
    Mounting Bracket IncludedYes
    Muffler (Left) Body Height5.00
    Muffler (Left) Body Length13.50
    Muffler (Left) Body Width10.00
    Muffler (Left) TypeChambered
    Muffler (Right) Body Height5.00
    Muffler (Right) Body Length13.50
    Muffler (Right) Body Width10.00
    Muffler (Right) TypeChambered
    Muffler Body Diameter10.00
    Muffler Body Height5.00
    Muffler Body Length13.50
    Muffler Body Material409 Stainless Steel
    Muffler Body ShapeOval
    Muffler Body Width10.00
    Muffler FinishBlack High-Temperature Paint Finish
    Muffler Flanged InletNo
    Muffler Flanged OutletNo
    Muffler IncludedYes
    Muffler Inlet ConnectionSlip-Fit
    Muffler Inlet Inside Diameter2.50
    Muffler Inlet Outside Diameter2.63
    Muffler Outlet ConnectionSlip-Fit
    Muffler Outlet Quantity1
    Muffler Quantity2
    Muffler SeriesSuper 40 Series
    Muffler TypeChambered
    part typeExhaust System
    Pipe ColorSilver
    Pipe Material409 Stainless Steel
    Pipe Wall Gauge16
    Product TypeExhaust System
    Sound LevelAggressive / Moderate
    Spring Bolt Kit IncludedNo
    Sub CategoryExhaust and Tail Pipes
    Tail Pipe Outlet Outside Diameter2.50
    Tail Pipe Quantity2
    Tail Pipe QuantityDual
    Tail Pipe Tapered OutletNo
    TypeCrossmember-back
    Valve IncludedNo
    Valve TypeNot Applicable
    WarningCalifornia Proposition 65
  • Instructions

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Union Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.