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MagnaFlow Sys CB 66-72 GM CST-10/CST-20

SKU: MAG16643

Exhaust Systems

MAG Catback Exhaust...

MagnaFlow Sys CB 66-72 GM CST-10/CST-20

SKU: MAG16643

Exhaust Systems

MAG Catback Exhaust...

A$2,621.04
Available from MFR. In stock at 2 locations (more than 10 available)

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Description

Exhaust System - Street Series - Header-Back - 2.5 in Diameter - Stainless - Natural - Chevy V8 - GM Fullsize Truck 1960-72 - Kit

MagnaFlow Sys CB 66-72 GM CST-10/CST-20

The MagnaFlow Street Series Crossmember-Back Performance Exhaust System 16643 brings enhanced engine sound and dyno-proven performance to your 3.8L, 4.1L, 4.3L, 4.6L, 4.8L, 5.0L, 5.3L, 5.7L, 6.5L, 6.6L 1960-1972 Chevrolet with a healthy helping of our deep, resonant signature exhaust note at Aggressive exterior and Moderate interior sound levels. Thanks to its durable, corrosion resistant stainless steel design, this Chevrolet exhaust system will handle whatever tarmac you decide to leave your mark on. This performance exhaust kit features a crossmember-back layout designed to replace your Chevrolet's exhaust system from the crossmember on back. With its fast-flowing, mandrel bent 2.5in. main piping and 2 Straight-Through mufflers ending in a Dual Split Rear Behind Rear Tires exit that you can enhance with tips of your choosing, your muscle car will be sounding as awesome as it looks. Extensive 3D scanning during development has resulted in a direct-fit design that you can easily install yourself. 16643 is produced using CNC precision robotic manufacturing techniques and is backed by MagnaFlow's limited lifetime construction warranty.

Additional Information

Magnaflow Street Series Stainless Crossmember-Back System

Part Type

Exhaust System Kit

Additional Application Notes
• w/ Rear Coil Springs DUAL SPLIT REAR BEHIND REAR TIRES EXIT
• With Rear Coil Springs DUAL SPLIT REAR BEHIND REAR TIRES EXIT

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

Data: v4.2 - Upd: 2026-11-08 04:22:34

Features

  • CNC Precision Robotic Manufacturing Techniques
  • Durable Corrosion-Resistant Stainless Steel Construction
  • Dyno-proven performance

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Product Details

Anticipated Ship Out Time:Approximately 1-2 Days
Attachment Style:Weld-On
Attachment Type:Weld-On
Catalytic Converter Quantity:0
Clamp Type:Band Clamp
Clamping Type:Band Clamp
Clamps Included:Yes
Color/Finish:Stainless
Components:Band Clamp=8
Description:Street Series Stainless Crossmember-Back System
Exhaust Inlet Connection Type:Weld-On
Exhaust Pipe Material:Stainless
Exhaust Tip Quantity:0
Exhaust Type:Dual
Exit Location:Dual Split Rear Behind Rear Tires
Exit Position:Dual Split Rear Behind Rear Tires
Exit Quantity:Dual
Exit Style:Dual Split Rear Behind Rear Tires
Finish:Stainless
Gasket Included:No
Gasket Or Seal Included:No
Hangers Included:Yes
Inlet Connection Type:Weld-On
Inlet Inside Diameter:2.500 in.
Inlet Type:Weld-On
Main Piping Diameter:2.500 in.
Material:Stainless
Mounting Bracket Included:No
Muffler Body Diameter:4.000 in. x 9.000 in.
Muffler Body Finish:Polished
Muffler Body Height:4.000 in.
Muffler Body Length:18.000 in.
Muffler Body Material:Stainless Steel
Muffler Body Shape:Oval
Muffler Body Width:9.000 in.
Muffler Count:2
Muffler Finish:Brushed
Muffler Material:Stainless Steel
Muffler Quantity:2
Muffler Type:Straight-Through
Outlet Outside Diameter:2.500 in.
Part Number:mag16643
Pipe Material:Stainless Steel
Recommended Use:Performance
Series:Street
Sound Level:Moderate
Subtitle:Crossmember-Back Performance Exhaust System
Subtitles:Crossmember-Back
System Type:Crossmember Back
Tail Pipe Diameter:2.500 in.
Tip Diameter:No Tip
Tip Quantity:0
Title:MagnaFlow Street Series Crossmember-Back Performance Exhaust System 16643
Tubing Diameter:2.500 in.
Type:Crossmember-Back
Valve Included:No
Valve Type:None
Warranty:Lifetime

Product Downloads

# Document Type Download
1. Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Data: v2 - Desc: v4.2 - Upd: 2026-11-08 05:01:20

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Magnaflow, MagnaFlow Exhaust Products, MAGNAFLOW PERF EXHAUST, Magnaflow Performance
StreetFX SKU mag16643
SFX Item ID 4284727
Accounting SKU mag-16643
Manufacturer SKU 16643
Manufacturer UPC 841380019349
Alternative References 16643, MFL16643, MPE-16643

Exhaust System, Crossmember-Back, Stainless Steel, Tru-X, Chevy, GMC, Pickup, RWD, Small Block, Kit

MagnaFlow Street Series performance exhaust systems deliver the smooth, deep sound you want—and the wide-open performance power you need! They feature straight-through flow designs for the ultimate in unrestricted horsepower and torque, while maintaining exhaust efficiency. These kits are an engineered balance of interior and exterior noise levels and are tested against SAE j1169 standards. Street Series components are built with 409 stainless steel and all mandrel-bent tubing. They're available in numerous configurations, including cat-back, rear axle-back, crossmember-back, and rear section; single, dual, tri, or quad turbo mufflers; and several outlet and tip options. Order the MagnaFlow Street Series performance exhaust tailored for your specific make and model. The systems carry a lifetime construction warranty.

Product Attributes
BrandMagnaFlow
Manufacturer's Part Number16643
Part TypeExhaust Systems
Product LineMagnaFlow Street Series Performance Exhaust Systems
UPC841380019349
System Material409 stainless steel
System StyleCrossmember back
Exhaust TypeDual
Exit LocationSplit side
System FinishNatural
Catalytic Converter(s) IncludedNo
Intermediate Pipe Diameter (in.)2.50 in.
Muffler IncludedYes
Muffler QuantityTwo
Muffler ConfigurationSingle inlet/Single outlet
Muffler StylePerforated tube with packing
Muffler Material409 stainless steel
Muffler FinishPolished
Hardware IncludedYes
Tailpipe Diameter (in.)2.50 in.
Tip IncludedNo
RemanufacturedNo
QuantitySold as a kit.
NotesDepending on vehicle configuration, some modifications may be required. See installation instructions for details, if applicable. Kit includes polished mufflers and Tru-X pipe. Designed to work with original style exhaust manifolds or tubular headers.
Special AttentionIt 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.

Manufacturer Attributes
Exhaust Tip Quantity 0
Catalytic Converter Quantity 0
Muffler Body Length 18
Muffler Quantity 2
Main Piping Diameter 2.5
Muffler Body Height 4
Muffler Body Width 9
Muffler Finish Brushed
Exit Style Dual Split Rear Behind Rear Tires
Gasket Or Seal Included No
Valve Included No
Mounting Bracket Included No
Pipe Material Stainless Steel
Muffler Body Material Stainless Steel
Muffler Type Straight-Through
Inlet Type Weld-On
Clamps Included Yes
Hangers Included Yes
Clamping Type Band Clamp
Series Street
Title MagnaFlow Street Series Crossmember-Back Performance Exhaust System 16643
Type Crossmember-Back
Manufacturer Designation Street Series Stainless Crossmember-Back System
Product Class Exhaust System Kit
Construction/Type Magnaflow Street Series Stainless Crossmember-Back System
Product Outline Durable corrosion-resistant stainless steel construction
CNC precision robotic manufacturing techniques
Dyno-proven performance
Vehicle Brief Exhaust System
Market Description The MagnaFlow Street Series Crossmember-Back Performance Exhaust System 16643 brings enhanced engine sound and dyno-proven performance to your 3.8L, 4.1L, 4.3L, 4.6L, 4.8L, 5.0L, 5.3L, 5.7L, 6.5L, 6.6L 1960-1972 Chevrolet with a healthy helping of our deep, resonant signature exhaust note at Aggressive exterior and Moderate interior sound levels. Thanks to its durable, corrosion resistant stainless steel design, this Chevrolet exhaust system will handle whatever tarmac you decide to leave your mark on. This performance exhaust kit features a crossmember-back layout designed to replace your Chevrolet's exhaust system from the crossmember on back. With its fast-flowing, mandrel bent 2.5in. main piping and 2 Straight-Through mufflers ending in a Dual Split Rear Behind Rear Tires exit that you can enhance with tips of your choosing, your muscle car will be sounding as awesome as it looks. Extensive 3D scanning during development has resulted in a direct-fit design that you can easily install yourself. 16643 is produced using CNC precision robotic manufacturing techniques and is backed by MagnaFlow's limited lifetime construction warranty.

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