Gt Cat Back 3 Inch Vs 2.5 Inch. H Pipe Vs X Pipe?

S

stang9779

Member

Feb 19, 2015

25

10

13

Feb 20, 2015

#1

• Feb 20, 2015

• #1

I'm looking at getting a cat back system. I'm new to modding V8's and want to get the best setup for the money (budget freindly).

I have been either looking at getting the Ford Racing resignator delete X pipe and Rush axle back. Which is 2.5 inch. Or the stainless MBRP H pipe cat back 3 inch. Which setup would have more power benifets (ie the best setup)?

 

84Ttop

They make new pistons every day, so why worry?

5 Year Member

Jul 2, 2009

5,222

3,254

204

South Jersey

Feb 23, 2015

#2

• Feb 23, 2015

• #2

I personally like the Magnaflow setup the best. Stainless steel and top quality as far as fitment and sound imho. Either way, I would look for the 3" system. We have an in house chassis dyno and with my Magnaflow Competition Cat back we gained 10 peak rwhp and 19 rwhp over the curve which is pretty impressive if you ask me!!

 

S

stang9779

Member

Feb 19, 2015

25

10

13

Feb 23, 2015

#3

• Feb 23, 2015

• #3

84Ttop said:

I personally like the Magnaflow setup the best. Stainless steel and top quality as far as fitment and sound imho. Either way, I would look for the 3" system. We have an in house chassis dyno and with my Magnaflow Competition Cat back we gained 10 peak rwhp and 19 rwhp over the curve which is pretty impressive if you ask me!!

Click to expand...

With the 3" setup over the 2.5" would I loose some low end power?

Sent from my SM-N915T using Tapatalk

 

84Ttop

They make new pistons every day, so why worry?

5 Year Member

Jul 2, 2009

5,222

3,254

204

South Jersey

Feb 24, 2015

#4

• Feb 24, 2015

• #4

stang9779 said:

With the 3" setup over the 2.5" would I loose some low end power?

Sent from my SM-N915T using Tapatalk

Click to expand...

Not at all, we saw gains across the entire curve when testing the 3" cat back system

 

Reactions: stang9779

S

stang9779

Member

Feb 19, 2015

25

10

13

Feb 24, 2015

#5

• Feb 24, 2015

• #5

84Ttop said:

Not at all, we saw gains across the entire curve when testing the 3" cat back system

Click to expand...

Thanks for your help I'm looking forward to getting a 3 inch exhaust here soon.

The only thing I just got set back because the Mustang doesn't go in the snow with those factory summer tires. I had to buy studded snows all the way around to get around here in Denver Colorado. we had a storm over the weekend that was almost a foot and tomorrow they're calling for another 9 inches. And on Saturday 2 to 4 again. We usually don't get this much snow all at once in Denver only the mountains does

Sent from my SM-N915T using Tapatalk

 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

Admin Dude

Jan 4, 1985

43,100

21,282

234

Box behind Walmart

Feb 24, 2015

#6

• Feb 24, 2015

• #6

stang9779 said:

With the 3" setup over the 2.5" would I loose some low end power?

Sent from my SM-N915T using Tapatalk

Click to expand...

I see that the myth persists.

 

Reactions: 85rkyboby and 84Ttop

justinakajuice

Active Member

Jan 20, 2015

138

23

28

Feb 24, 2015

#7

• Feb 24, 2015

• #7

I assume that the factory manifolds and cats provide plenty of back pressure.

 

NJBob

Active Member

Dec 18, 2014

102

17

38

NJ

Feb 24, 2015

#8

• Feb 24, 2015

• #8

stang9779 said:

I'm looking at getting a cat back system. I'm new to modding V8's and want to get the best setup for the money (budget freindly).

I have been either looking at getting the Ford Racing resignator delete X pipe and Rush axle back. Which is 2.5 inch. Or the stainless MBRP H pipe cat back 3 inch. Which setup would have more power benifets (ie the best setup)?

Click to expand...

I went with the Roush axle back because I liked the sound and it was only 550. I had it a month and love it. I just ordered the ford resonator delete x- pipe. I like x better than h and the cost was only another 240

 

S

stang9779

Member

Feb 19, 2015

25

10

13

Feb 24, 2015

#9

• Feb 24, 2015

• #9

NJBob said:

I went with the Roush axle back because I liked the sound and it was only 550. I had it a month and love it. I just ordered the ford resonator delete x- pipe. I like x better than h and the cost was only another 240

Click to expand...

Post a video once your setup is installed. I would live to see it.

Sent from my SM-N915T using Tapatalk

 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

Admin Dude

Jan 4, 1985

43,100

21,282

234

Box behind Walmart

Feb 24, 2015

#10

• Feb 24, 2015

• #10

justinakajuice said:

I assume that the factory manifolds and cats provide plenty of back pressure.

Click to expand...

Again?


Exhaust back pressure does not produce torque. Improper exhaust scavenging has the potential to reduce performance but should not be associated with increasing backpressure.

Backpressure in an exhaust system is not a good thing. A system too large for application is also not desirable.

 

justinakajuice

Active Member

Jan 20, 2015

138

23

28

Feb 26, 2015

#11

• Feb 26, 2015

• #11

Again, no one said anything about back pressure making torque. I stated that the stock manifolds and cats should provide an adequate platform without problems.