Gibson Performance Exhaust Dual Split Rear Cat-Back, 4in Polished Stainless Tip (Classic Body)
Fits 2009-2018 5.7L HEMI V8 (DS)
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Price tracked 12 times since Jul 26, 2026 across the stores we check daily: low $654.42, high $1,523.91, currently $654.42.
Requires: Old body (DS) only. Gibson sells 66570 for the 2019-2024 new-body truck; the two are not interchangeable.
where to buy · 2 retailers tracked
A cat-back exhaust for the older-body HEMI truck. It swaps the pipes, muffler and tip behind the catalytic converter for 2.50in mandrel-bent 409 stainless tubing, a Superflow chambered muffler and a 4in polished tip, using the factory hangers.
why this one — If you have the 2009-2018 truck this is the correct Gibson, and buying the newer 66570 by mistake is an expensive error. Same published numbers as the new-body kit, 10-15 hp and 15-20 lb-ft down in the 1,800-3,000 rpm range where a working truck spends its time, and it comes in about 220 dollars under the new-body system. The trades are the same too: 409 stainless tubing rather than T304 throughout, so expect surface rust sooner if you live where roads get salted, and the tip here is 4in rather than the 5in on the newer kit.
CLAIMED (manufacturer dyno) - gibsonperformance.com product page for 66565 states the system is "Dyno-proven to deliver 10-15 horsepower and 15-20 lb-ft of torque", maximised between 1,800-3,000 RPM. Gibson's own dyno, no independent verification found this pass.
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