Flowmaster Street Performance Mufflers (40 Series Delta Flow Muffler) | GMC Jimmy - Sierra Grande, 305ci. V8 (1977-1979)

Vendor: Flowmaster
SKU: 842543

This product usually ships between today and 2 business days


  • Flowmaster Street Performance Mufflers are the surefire way to boost your ride's power and sound
  • Those unmistakable Flowmaster tones are now only a quick installation away
  • Available in Aluminized, 304 Stainless or 409 Stainless (for most models)—both fully MIG-welded for maximum durability
  • Bolsters torque, horsepower and even mileage
  • Reduces engine heat and wear
  • Available in a variety of tones—mild, moderate and aggressive (depends on model)
  • Ideal for all types of driving conditions
  • Made for your year, make and model (may require modification during installation)
  • Backed by a 3-year warranty on aluminized steel and a limited Lifetime Warranty on stainless steel
Power up to an enriched driving experience with Flowmaster Street Performance Mufflers perched from your ride's back end. When you ditch that stock muffler and hit the gas with Flowmaster in your corner, getting behind the wheel is always a pleasure.

With tones that vary from mild and moderate to aggressive (depends on model), heads are sure to turn whether your cruising on that daily drive or burning rubber at the weekend track. And, Flowmaster mufflers go above and beyond your expectations when it comes to improved gas mileage, torque and horsepower.

Made for your year, make and model (may require modification during installation), these Street Performance Mufflers by Flowmaster also reduce heat and other stress factors on your engine. What's more, your new Flowmaster is backed by a 3-year warranty on the aluminized steel mufflers, and a limited Lifetime Warranty on the stainless steel mufflers.