weld-ins vs. catback

[StangLou]

unless you don't care about performance, don't half-ass it. get the full cat-back. i got my Magnaflow cat-back for less than $320 shipped to my door.

Riiiiiiiiighttttt.........

You MAY see 4-5hp with a catback system... MAY

My 40 Series flows welded in cost me $150 with labor. Compare that to the $350-400+ youll spend on American Thunder or most other catbacks out there.
Dont get me wrong, if you want the all out sound then go for the full catback, they are a bit louder than just welding in mufflers. As for performance, your not going to see but maybe a 1-2hp difference in doing a full catback instead of mufflers. Its up to you though. Regardless you will be very happy with that Flowmaster sound
Of course there is always the idea that Im just not concerned with performance

 

[natx808]

MagnaFlow’s catback achieved 12.5 RWHP and 8.2 RWT on a Mach 1. Too bad they didnt compare vs. weld ins I would be curious.

 

[twogts4us]

The biggest restriction in our exhausts are the stock mufflers.

Oh, I don't think so. Those cats are pretty darn restrictive.

 

[DBMSTNG]

Riiiiiiiiighttttt.........

You MAY see 4-5hp with a catback system... MAY

My 40 Series flows welded in cost me $150 with labor. Compare that to the $350-400+ youll spend on American Thunder or most other catbacks out there.
Dont get me wrong, if you want the all out sound then go for the full catback, they are a bit louder than just welding in mufflers. As for performance, your not going to see but maybe a 1-2hp difference in doing a full catback instead of mufflers. Its up to you though. Regardless you will be very happy with that Flowmaster sound
Of course there is always the idea that Im just not concerned with performance

on a stock setup you aren't going to see much of a gain either way, but clear up the bottleneck (IE: h-pipe) and the increase over the stock cat back pipes grows. that's why i mentioned performance.

have you ever compared the stock cat back pipes to an aftermarket set? the stock pipes are bent like crap.

 

[FallenPhoenix]

on a stock setup you aren't going to see much of a gain either way, but clear up the bottleneck (IE: h-pipe) and the increase over the stock cat back pipes grows. that's why i mentioned performance.

have you ever compared the stock cat back pipes to an aftermarket set? the stock pipes are bent like crap.

Are our pipes crimp bent? I feel ashamed I haven't been under the stang enough to notice

 

[LI98GTStang]

Are our pipes crimp bent? I feel ashamed I haven't been under the stang enough to notice

Yes, unfortunately they are - have a look directly behind the wheel, for clearance, they pinched the pipe right there for you to see. High flow (or no) catted X or H is definately the restrictive part though and you save some weight over stock also. I too was going to get the weld-in route and still think it's a good choice. I like the Steeda SS mufflers as an option but after seeing the crimping and pinching of the stock exhaust, I went for the FRPP catback instead. I also had an aversion to taking off the stock SS mufflers and welding in mufflers that weren't SS, so cost of SS type mufflers was only about a $50 delta.

 

[Back2Mustangs]

I have an idea...

Weld in some mufflers, put a turbo or blower on it and don't worry if the pipes are crimped or mandrel-bent. Just force the air through it!

Seriously, if you care about a few extra HP get the catback. If you just want the car to sound good, get some weld-ins. Either way get an off-road H-pipe=sounds great and gives you a few extra HP!