Anyone out there with a Flowmaster American Thunder cat back system? I am building a 406 small block chevy decent cam, mildly built 380-400 HP hopefully. I was just wondering how you guys like your flowmastes so far, im looking for a real loud exhaust so i got the american thunder 3 inch system with an 80 series muffler and i am really anxious to hear what its going to sound like.

 

I have the Flowmaster American Thunder Cat-Back w/ the 80 series muffler single 3" inlet dual 3" outlet. I like the sound, mellow deep rumble @ idle but screams when hard on the throttle. BTW my car is also equpped w/ SLP 1 5/8 headers & a hi-flo cat.

 

i am thinking on getting this system too...

I want the polished slashed back tips... do they come with that or what???

 

Yeah i got the 3 inch single cat back and looks like duals in the back, with two 3 inch polished pipes coming out. The kit came with the stainless polished pipe like you are talking about, not too shiny but i think it will good. I got one made for a single cat however i wont be running any cats and i have a hedman headers, hoping this combo will give me that nice loud rumble.

 

Check my sig for an audio clip. It's 3" in, 3" out with dual cats and dual outlets.

 

I was out taking pics of the car, here's a pic of the Flowmasters from the back.

 

Just to let you know, on dyno tests on higher HP engines like you plan, it's been proven that the Hooker cat-back produces about 7 hp more than Flows. Just something to think about. Sound clip is in the signature. Of course if possible I would go with duals.

 

This is a flowmaster thread

 

Its proven to flow better by the manufacturer.

Synaps, nice car, (Red IROC-Z's ) but you can't see the tips in that picture.

 

Picky picky.

 

LOL, there we go.

 

Is there a difference. If the manufacturer isn't being truthful then they can be sued for false advertisement.

 

Manufactuers do it all the time. Ever see a K&N commercial?!

 

hey Synapsis, your exhaust sounds great, cant wait to hear mine, should be a little bit louder than yours, i have decently built 400 with a nice cam and im not going to be runnin any cats

 

You should hear a Camaro with Straight Pipes and Glass Packs on it.

Bret

 

Ill stick to my american thunder flowmasters

 

Yup.

 

I love my Flowmaster. The Hooker sound nice but not as nice as my Flow.

 

Yes, do that.

 

No need to bolt on a supercharger, a K&N Filter gives you a dyno proven same power increase!

 

As a 1200$ exhaust system, as they show a Viper on the screen. Headers for a Viper are 1200$ alone.

I have K&N's on both of my cars, they still need forced induction if ya ask me.

 

"No need to bolt on a supercharger, a K&N Filter gives you a dyno proven same power increase!"

Yup, LOL!!

 

If you want even more power, slap a Tornado inside of that K&N. Then you will have at least 50hp more for about $50.

 

allright guys, its time for another trip down to summit racing... i need to get a y pipe for my exhaust system. I have the American Thunder 3 inch cat back, with hedman shorty headers with a 3 inch collector and i am not running a cat. I looked at summit and the hedman y pipe is out of stock until august so what are my other options? Does flowmast make a y pipe for our cars?

 

It just so happens that I have got a hedman Y-pipe for a single cat exhaust in my garage from my 87 IROC that I sold. It was installed for about 1 hour and the engine never ran with it on. It was $100 new. Make me an offer. send me an email to KGV@packereng.com