With a straight-through design for maximum flow and power, Thrush® Glasspack mufflers feature exclusive Continuous Roving Fiberglass technology that absorbs unwanted resonance while maintaining a powerful tone.
- VINTAGE SOUND — Delivers a powerful tone that is ideal for muscle cars, trucks and classic vehicles
- PREMIUM ACOUSTIC CONTROL — Exclusive Continuous Roving Fiberglass (CRF) technology absorbs unwanted interior resonance
- ENGINEERED TO LAST — Durable heavy-gauge steel shell with high-gloss red powder-coat finish
- SUPERIOR PERFORMANCE — Straight-through design for maximum flow and power
- FLEXIBLE SOLUTION — Customizable design offered in a variety of styles and sizes for universal fitment (may require specialized fabrication and/or welding)
- SPECS — Available in 3.5-in. or 4-in. body; offered in a variety of overall lengths and inlet/outlet size configurations; see product specifications for more information

















Brandon Martinez –
What happened with the free sticker you used to get with these
AmazonTony G Customer –
Excellent quality muffler for reasonable price.Great care free delivery to the door, without in store shopping.
billymonster –
Sounds great on my 440
Jeff J. –
Put on a straight six ford truck. Sounds good. Happy with the price and sound. Fit well.
Amazon Customer –
It’s a great first exhaust to get if you want one and don’t want to drop money on a flow master. Personally I loved it, I have a 05 Kia Sportage V6, had chopped the exhaust and need something to tone it down a little, I welded it with a Chicago electric flux core from harbor freight and it was an easy weld to do. If you have a vehicle that your want to put a exhaust on with out just chipping and leaving. Great investment
Maddog –
This is not the first one I ever bought I’ve been buying them since the seventies and still as good as ever.
Doc –
Easy to install. Nice rumble.
ronald l. –
3 litre ford dual OC 24 valve 6 cyl. A little too loud, but sweet sound, better mileage, smoother power