Hi Flo cats vs Mid pipes

[fastblksrt]

Guys can't decide what to get so any information such as pros & cons, HP gains between them is appreciated. Thanks in advance

 

[Bone]

High flow cats would probably get you 5-10 HP alone, and another 5Hp taking them out. This is a WAG. I don't know if there is a dyno alone showing this. Most have done High flows or no cats with headers and exhaust all at once.

 

[Nowwhat]

we had an older post that said 15 rwhp for cat delete.....

 

[Blakewilder]

It isnt much difference.....I went with the hiflows cuz i felt I needed a little back pressure....although it is splitting hairs.

 

[John Stuttle]

I performed dyno's before and after removing all four cats and gained 15HP. This is with stock exhaust manifolds. - - john

 

[moparracing]

I performed dyno's before and after removing all four cats and gained 15HP. This is with stock exhaust manifolds. - - john

did you have to use cat sims for the back two o2 sensors to prevent a cel on the dash ??

thanks.

 

[John Stuttle]

Yes i had to use the rear sims. I am using these $25 ones:

http://www.o2simulator.com/

They also have a support forum there.

john

 

[FaSt ReD SrT10]

Yes i had to use the rear sims. I am using these $25 ones:

http://www.o2simulator.com/

They also have a support forum there.

john

That looks like a great place to get them from!

Thanks alot!:rock:

 

[SANCHOBA]

i went the high flow cat route,no messing with 02 sims,no codes!:star:

 

[moparracing]

Yes i had to use the rear sims. I am using these $25 ones:

http://www.o2simulator.com/

They also have a support forum there.

john

the site says you only need one sims for both of the back o2 sensors... is that what you did ?

also, did you completely remove the o2 sensors or just add the o2 sims in with the sensors ??

thanks.

 

[Dominick572]

im on F YOU Pipe list for the next RC batch Steve makes. cannot wait for them ill find out weather or not ill pass emissions with the hi flo cats too.

 

[HOT RAM]

I am going to try them also.Need to quiet it down just a bit and hi-flows may help a little over the straight pipes.

 

[Dominick572]

they should sound good with my new b&b that should be in the mail soon

 

[HOT RAM]

I have the MagnaFlow ( all the way 3",NO 2 1/2" for me).I may also install two resonators and see how that sounds.

 

[John Stuttle]

the site says you only need one sims for both of the back o2 sensors... is that what you did ?

also, did you completely remove the o2 sensors or just add the o2 sims in with the sensors ??


thanks.

I took the sensors out & plugged the holes. Then added the two of the O2 simms - john

 

[moparracing]

I took the sensors out & plugged the holes. Then added the two of the O2 simms - john

thanks john, i'll have to look into that website when i finally get my order from boomer (2 months & patiently waiting).........