high flow cats worth it?
06-16-2009, 03:44 AM
#1
6th Gear Member
Thread Starter
Join Date: Jan 2008
Location: North Pole
Posts: 6,716
high flow cats worth it?
Getting shorty headers put in soon, should I replace the stock cats with high flow cats?
are they worth replacing to pick up some extra HP??
brands worth looking into ?
(-:
are they worth replacing to pick up some extra HP??
brands worth looking into ?
(-:
06-16-2009, 04:26 AM
#2
5th Gear Member
Join Date: Sep 2007
Location: Escondido, California
Posts: 2,018
I like my hi-flows. They do add a little tq/hp compared to stock H and O/R prochamber. Here are some comparisons. Keep in mind that it was on the same dyno, but on different days.
Stock H 298 RWHP/ 309 RWTQ
O/R prochamber 302 RWHP/ 305 RWTQ
Prochamber with hi-flows 305 RWHP/ 312 RWTQ.
Out of the three set-ups, the hi-flows make the car sound the best. Louder than the stock H about as deep. Almost as loud as the o/r but inside the car sound cleaner and deeper.
Stock H 298 RWHP/ 309 RWTQ
O/R prochamber 302 RWHP/ 305 RWTQ
Prochamber with hi-flows 305 RWHP/ 312 RWTQ.
Out of the three set-ups, the hi-flows make the car sound the best. Louder than the stock H about as deep. Almost as loud as the o/r but inside the car sound cleaner and deeper.
06-16-2009, 05:23 AM
#3
6th Gear Member
Thread Starter
Join Date: Jan 2008
Location: North Pole
Posts: 6,716
damn, nine hp?? not bad... I thought about just replacing with a new H-pipe with High flow cats as well, but I already have cut outs and don't want to transfer them not splice into a new pipe.
If those numbers are accurate, the high flow cats sound like a great deal.. just as long as they don't bust out lol..
thanks!
If those numbers are accurate, the high flow cats sound like a great deal.. just as long as they don't bust out lol..
thanks!
06-16-2009, 06:26 AM
#4
1st Gear Member
Join Date: Sep 2006
Location: Central Florida
Posts: 136
If i'm rememberng right I read somewhere on the forum here that the stock cats are the most restrictive part of our exhaust system. So offroad setup may be the best but High flow cats are deffinitely an improvement
06-16-2009, 07:47 AM
#5
2nd Gear Member
Join Date: Jun 2008
Posts: 389
after doing shorty headers and magnaflow actted x i noticed a def increase and power. and i get sick gas mileage now. i commute to school and get 20-20.5 MPG when i was getting only 18-19. high way i was getting about 30 give or take. i say do it!
06-17-2009, 12:56 AM
#8
5th Gear Member
Join Date: Jun 2007
Location: City of God
Posts: 2,358
I like my hi-flows. They do add a little tq/hp compared to stock H and O/R prochamber. Here are some comparisons. Keep in mind that it was on the same dyno, but on different days.
Stock H 298 RWHP/ 309 RWTQ
O/R prochamber 302 RWHP/ 305 RWTQ
Prochamber with hi-flows 305 RWHP/ 312 RWTQ.
Out of the three set-ups, the hi-flows make the car sound the best. Louder than the stock H about as deep. Almost as loud as the o/r but inside the car sound cleaner and deeper.
Stock H 298 RWHP/ 309 RWTQ
O/R prochamber 302 RWHP/ 305 RWTQ
Prochamber with hi-flows 305 RWHP/ 312 RWTQ.
Out of the three set-ups, the hi-flows make the car sound the best. Louder than the stock H about as deep. Almost as loud as the o/r but inside the car sound cleaner and deeper.
06-17-2009, 11:49 AM
#9
5th Gear Member
Join Date: Aug 2006
Location: MD
Posts: 2,083
I have high flow cats and they added hp and a little more sound. I recommend them for Long tubes and shorties. The only time I wouldn't recommend them is if the car is lowered and you do long tubes. Scrapping problems.