Flowmaster Mufflers 70 Series Big Block II

View larger image
Internal Cut Away View of Flowmaster 70 Series Big Block II Muffler - Product May Vary
Additional Views
List Price:
AutoAnything:
Shipping: Free Shipping
Availability:
Financing:
Bill Me Later - Buy Fast. Feel Secure. Pay Later!
Customer Rating: Customer Rating
         

Center Inlet / Center Outlet
Select options to see availability.

Center Inlet / Dual Outlet
Select options to see availability.

Center Inlet / Offset Outlet
Select options to see availability.

Dual Inlet / Center Outlet
Ships between 11/23/2009 - 11/24/2009

Dual Inlet / Dual Outlet
Ships between 11/23/2009 - 11/24/2009

Offset Inlet / Center Outlet
Select options to see availability.

Offset Inlet / Dual Outlet
Ships between 11/23/2009 - 11/24/2009

Offset Inlet / Opposite Side Offset Outlet
Select options to see availability.

Offset Inlet / Same Side Offset Outlet
Select options to see availability.
Product InfoManufacturer InfoReturn Information

Features

  • The Flowmaster 70 Series Big Block II Muffler is specially-made for big trucks, SUVs, RVs and any other towing vehicle
  • Accommodates maximum exhaust volume for handling huge engines at maximum load
  • Provides outstanding boosts to power and torque to towing excellence
  • The Flowmaster 70 Series adds a throaty mild exhaust tone to your vehicle without overpowering volume
  • Utilizes Flowmaster's exclusive Delta Flow technology for superior scavenging and minimal interior resonance
  • Quality Flowmaster muffler crafting uses aluminized steel for corrosion resistance and precise mig welds for maximum durability
  • Casing embossed with the Flowmaster name
  • Fits vehicles that do not match the 50 Series Big Block Muffler
  • Your Flowmaster 70 Series Big Block II Muffler carries a 3-year warranty

Description

Maximum flow volume, maximum efficiency, maximum power. The Flowmaster 70 Series Big Block II Muffler does it all for your big, bad truck, SUV, RV or other towing vehicle. With its massive chamber, the Flowmaster 70 Series handles the output of huge working engines at their highest load, boosting torque right when you need it.

The Flowmaster 70 Series Muffler also uses exclusive Delta Flow technology for the least possible interior resonance, thanks to precision deflectors in the chamber. These exact parts also aide exhaust gas scavenging for scraping together the most power and torque possible.

The 70 Series Big Block II Muffler boasts the quality construction you'd expect from Flowmaster. Each Flowmaster Muffler is built with 16-gauge aluminized steel for corrosion resistance and fully mig-welded for maximum durability. Best yet, your Flowmaster 70 Series Big Block II Muffler boasts a 3-year warranty.

Notes

  • Flowmaster 70 Series Big Block II Mufflers come in a variety of inlet/outlet configurations and sizes, shown above. Select the inlet/outlet diameter you need from the drop down at right.

Flowmaster Mufflers 70 Series Big Block II Customer Reviews

Average Customer Rating

   (15)
Appearance Appearance
Ease of Installation Ease of Installation
Price/Value Price/Value
Quality Quality
Sort By
Quiet yet still sounds good

Posted on 10/10/2009 by Timothy M. - 2009 Dodge Ram (Corpus Christi,TX)

0 of 1 people found the following review helpful.

Appearance
Ease of Installation
Price/Value
Quality

"This muffler I think would be better suited for a larger engine. My HEMI on my new Ram doesn't give it the echoey sound I hear on other Flowmasters. Going to order a 50HD series soon"

Was this review helpful? Yes No

About Timothy M.
Vehicle
2009 Dodge Ram
I use my vehicle for
Everything
 
Paul in Sherwood, OR

Posted on 10/14/2008 by Paul G. - 2002 Chevy Express (Sherwood,OR)

3 of 3 people found the following review helpful.

Appearance
Ease of Installation
Price/Value
Quality

"The tech support rep recommended this muffler for my one ton Chevy Van. It was a perfect fit, the muffler shop I chose had no trouble installing it. They made a new full 3" tailpipe to match the muffler output. It's nice to be able to hear the engine running now, the noise inside is audible but not too loud. The sound outside is best described as muscular & throaty. Great sound. It is too early to tell if my gas mileage has improved or how it performs pulling my RV trailer. I also added a K&N air filter."

Was this review helpful? Yes No

About Paul G.
Vehicle
2002 Chevy Express
I use my vehicle for
Business, recreation, prime mover for toys.
 
Sound level & Flow (fuel milage)

Posted on 09/17/2008 by Steve M. (Lake Havasu City,AZ)

2 of 2 people found the following review helpful.

Appearance
Ease of Installation
Price/Value
Quality

"Having a older Suburban!!fuel mileage is not the best... I chose a 70 series Flowmaster to recoupe some milage!! It's to early to tell about the milage but the sound is just what I was looking for!! a little throaty but not loud (my wife hasn't noticed the difference in the sound yet) that's a good thing... I'm sour this will fit my needs."

Was this review helpful? Yes No

About Steve M.
I use my vehicle for
Travel,Family Activities..
 
Flowmaster Mufflers 70 Series Big Block II

Posted on 04/15/2008 by Wayne S. - 2001 Dodge Durango (Bronx,NY)

7 of 8 people found the following review helpful.

Appearance
Ease of Installation
Price/Value
Quality

"i love my flowmaster nice sound when i stomp on the go pedal quiet at idle its my second one"

Was this review helpful? Yes No

About Wayne S.
Vehicle
2001 Dodge Durango
I use my vehicle for
commuting
 
Great sound

Posted on 04/14/2008 by Steven E. - 2005 Chevy Silverado (Buckeye,AZ)

12 of 12 people found the following review helpful.

Appearance
Ease of Installation
Price/Value
Quality

"I have a 2005 chevy 4x4 2500hd. Had 40 series and hated them I'm 52 years old and they were too loud. The 70 series are great good deep sound and not so loud."

Was this review helpful? Yes No

About Steven E.
Vehicle
2005 Chevy Silverado
I use my vehicle for
Every day use.
 
better than some, worse than other

Posted on 04/04/2008 by Jerry U. - 1999 Dodge Ram (Scottsville,KY)

2 of 8 people found the following review helpful.

Appearance
Ease of Installation
Price/Value
Quality

"sounds ok"

Was this review helpful? Yes No

About Jerry U.
Vehicle
1999 Dodge Ram
I use my vehicle for
work
 
Flowmaster 70 for Toyota Tundra 2007

Posted on 01/23/2008 by David P. - 2007 GMC Envoy (Galveston,TX)

4 of 4 people found the following review helpful.

"Great sound with little to no resonance inside cab. Had a muffler included with the JBA exhaust system and it was junk. Stainless steel, but just a big glass pack. The resonance inside cab was horrible. The 70 series sounds good on the outside without the resonance inside the cab."

Was this review helpful? Yes No

About David P.
Vehicle
2007 GMC Envoy
 
Smooth, Quiet, and Tough Sounding Muffler

Posted on 07/26/2007 by Phillip E. - 1997 Dodge Ram (Crestview,FL)

11 of 12 people found the following review helpful.

"I bought this muffler to tone down the sound of my 97 Dodge Ram. My truck sounds as great as ever when accelerating, but it's quiet rumble doesn't wake my family when I head out in the morning."

Was this review helpful? Yes No

About Phillip E.
Vehicle
1997 Dodge Ram
I use my vehicle for
Local travel, hunting, hauling stuff.
 
my truck

Posted on 07/18/2007 by John K. (Warfield,KY)

4 of 6 people found the following review helpful.

"turned out to be the best sound i have had."

Was this review helpful? Yes No

About John K.
I use my vehicle for
all things below
 
Perfect for Explorers

Posted on 05/24/2007 by Igor K. - 1999 Ford Explorer (Kirkland,WA)

8 of 9 people found the following review helpful.

"I have an explorer V6 SOHC. After installation I got: 1. Better performance and improved MPG 2. Deep but not too loud sound, I was afraid that X will sound like a Civic."

Was this review helpful? Yes No

About Igor K.
Vehicle
1999 Ford Explorer
View all customer reviews for this product