What type of muffler is this? I really like these and want to put them on my bonneville.

Does anyone know where i can find some like this?

They sell some like that at pep boys

are these crappy mufflers? Will they sound the same as stock or what?

Magnaflow makes a muffler that will work and sounds great. You can add whatever tips you want to it, which is what i think you probably like about the muffler in your photo.

what is better for performance magnaflow or flowmaster 40 series?

What sounds deeper/louder.

As far as performance, both will yield about the same.

As far as sound, you can check out their web sites and listen to some sound files and make the determination yourself.

Magnaflow The Official Site of MagnaFlow Performance Exhaust - Exhaust Systems For Trucks, Suv'*, American Muscle, Diesel, & Sport Compact Vehicles
Flowmaster Flowmaster, Inc.

As far as mufflers go with me... i have an educated opinion about mufflers especially magnaflow vs flowmaster. Flowmaster is a chamber muffler that uses steel baffles to make the sound as to magnaflow is a glass packed type. although the flowmaster might sound better out the box, the lifespan is shorter than that of the magnaflow. as we know, H20 is a by-product of combustion. that water settles in the flowmaster and with time, it will rust out.
The magnaflow will take time to sound its best. and when it eaches that point, it stays there. it doesnt run the risk of getting hollow and making your exhaust gasses flow slower.

magnaflows are more expensive, but in my opinion. it is a better muffler. hands down.

I ran a Magnaflow *dont ask on the series* single inlet, dual outlet on my Mistubishi truck years ago, it was a 2.4 4-banger and I was questioned multiple times on whether it was a small block or a v-6 when cruising... it was DEEP... except when the rpms were up high, then the 4 cyl sound could be noted

flows on the other hand sound like a hollowed out ricer and makes all v-6s ive EVER heard sound gutless and crappy, IMO

just my 2 pennies