FREE SHIPPING on Orders Over $50*

Flowmaster 80 Series Cross-Flow Muffler - 52580

universal fit logo



For dual exhaust performance where only a single exhaust system will fit (such as is commonly found in classic Camaros and Firebirds), the 80 Series Cross-Flow muffler fits transversely behind the rear axle and in front of the fuel tank. This makes our Flowmaster 80 series muffler the perfect OE replacement - but with enhanced performance and sound. With single or dual inlets, the 80 Series gives excellent ground clearance, aggressive tone and offers dual outlets to fit muscle cars requiring this specialized fitment. Available in either 409S stainless steel or aluminized steel, it is fully MIG-welded for maximum durability.


Question & Answers

1 Answered question

Is this product Legal in California to be installed.

Asked by Tony from Temecula, CA on

Hi Tony, According to Flowmaster, this product is legal to run in California.

Answered by Aaron S. from Temecula, CA on


For over 30 years, Flowmaster has been producing exhaust products to combat noise issues that first cropped up on race tracks in California. The question was how to reduce sound without compromising performance? Advanced engineering and ample testing set Flowmaster's product line apart from competitors and a few of their more noteworthy parts include chambered mufflers, laminar flow designs and high flow catalytic converters. We carry Jeep exhaust pipes, exhaust flanges and complete exhaust systems among other Flowmaster products. The company's patented technologies, innovative designs and focus on performance keep Flowmaster at the forefront of aftermarket exhaust manufacturers. Shop Flowmaster Exhaust Now