Avanti7 Posted July 28, 2013 Report Share Posted July 28, 2013 Hi I'm Jim and a newbe to this forum. I recently purchased my first Avanti II, a 1970, 350/300, AT. I am very happy with this Avanti (I could have have used the word "car" but I love saying and typing Avanti). I want to change the mufflers to Flowmasters 40 series. The present mufflers are new and put on with U clamps, but I don't like the sound. Have any of you guys put Flowmaster 40 series on your Avanti's. Also with the U clamps I plan to change these out myself. Thanks for your help. Link to comment Share on other sites More sharing options...
Gunslinger Posted July 28, 2013 Report Share Posted July 28, 2013 (edited) I have Magnaflows on my '70 and like the deep, mellow tone that opens up at speed. I've found Flowmaster...while an excellent product...to have a loud, very raspy sound. I'm not 25 anymore so I'm lost past liking the raspy sound that shakes windows when driving down the street. BTW - welcome to the forum! Edited July 28, 2013 by Gunslinger Link to comment Share on other sites More sharing options...
Avanti7 Posted July 29, 2013 Author Report Share Posted July 29, 2013 Gunslinger thanks for your reply. I'm about a hundred years past 25 myself. I will look into Magnaflow. Hadn't thought about those. Is there a series number or name of yours. Also did you stay with the stock 2" system" Link to comment Share on other sites More sharing options...
Gunslinger Posted July 29, 2013 Report Share Posted July 29, 2013 Not sure what series Magnaflows are on the car...plus I have 2 1/2" pipes on my car. I'll see if I can find the paperwork showing what series the mufflers are. Link to comment Share on other sites More sharing options...
Avanti83 Posted July 29, 2013 Report Share Posted July 29, 2013 Agree with Bruce on Magnaflows. My 83 has a Simmons 2 1/4" SS exhaust with a pair of Magnaflow 11215 oval glasspacks on it. This is what they sound like up close, 355 SBC roller cam, alum heads, Holley EFI driven by a 70 YO that never grew up. Bob Link to comment Share on other sites More sharing options...
Avanti7 Posted July 29, 2013 Author Report Share Posted July 29, 2013 Thanks Bob for your info. I like the sound and look of your Avanti. Link to comment Share on other sites More sharing options...
Gunslinger Posted July 29, 2013 Report Share Posted July 29, 2013 I couldn't locate the paperwork for the Magnaflows on the car (they're stored away), but I believe they're part numbers 11216 Magnaflows. As I said before, they're 2 1/2" diameter pipes on the car. When the shop that fabricated the exhaust I specified that size as I wanted the engine to breathe! Link to comment Share on other sites More sharing options...
Avanti7 Posted July 31, 2013 Author Report Share Posted July 31, 2013 Gunslinger thanks for your help. I'll check out that part number. Link to comment Share on other sites More sharing options...
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