The MagnaFlow 16642 is a cat-back kit from the Street Series line, sold as a complete set that includes a polished muffler and resonators. Street Series components are built with 409 stainless steel and all mandrel-bent tubing. The designs use straight-through flow for less restriction while keeping exhaust efficiency. Compared with a stock system, that means a louder, deeper tone on the 6.1L HEMI SRT V8 without giving up the factory-style noise balance, since the kits are tested against SAE J1169 standards. The systems carry a lifetime construction warranty, which helps justify the price over cheaper universal pipes.
Fitment needs checking before you buy. The manufacturer's install-sheet index lists 16642 as a DODGE MAGNUM Stainless Cat-Back System, while other catalog text ties the number to 6.1L SRT-8 applications, so confirm your exact year, body style and engine with MagnaFlow. For DIY work, the manufacturer's sheets call for keeping the factory hardware: do not discard the OEM fasteners or damage the rubber insulators, and the kit must re-use original rubber insulators. Look for terms like 6.1 HEMI SRT8 cat-back exhaust, 409 stainless dual rear exit, and polished tip muffler when comparing options.
Yes, and the manufacturer expects it. Its install sheets for MagnaFlow systems say to keep the OEM rubber insulators and fasteners so the new system mounts correctly.
MagnaFlow recommends professional installation on all of its performance exhaust products, and its sheets say to tighten all band clamps very firmly to prevent leaks.
The manufacturer recommends at least 1/2 inch of clearance between the exhaust and any body panels to prevent heat damage.
Plan on a few hours with a lift or ramps. The manufacturer's install sheets for comparable MagnaFlow kits advise spraying penetrating lubricant on fasteners and hangers well before removal, and they call for a 15mm tool. Leave all clamps and hangers loose until the whole system is positioned, then tighten front to rear. Keep 1/2 inch of clearance from the body and recheck it after tightening. Confirm the torque values for this specific kit with the manufacturer's current install sheet before final tightening.
