down pipe with cat back
#1
down pipe with cat back
I tried searching the site for past info.but couldn't find anything. Does putting on a 3" downpipe with the cat back make a noticeable difference with HP and does it void the factory warranty or cause problems. I do have the performance upgrade. I've read that without the down pipe the cat back alone doesn't make an appreciable difference. I would like to hear from those who have done this or something very similar. Thanks!!
#2
I had the Hahn catted DP and catback installed in 1 shot. I've had it since the car had 2200 miles on it (19K now) and have never had any problems with it. When I had it initially dynoed it pulled 260hp, 250lb/tq. Typically the general consensus around here is that the DP is the biggest restriction point w/ the twin cats in place. I'd start there if you want to get some gains. Hope that helps.
Later
Allex
Later
Allex
#5
Does hahn or anybody still make downpipes for the hhr. I just bought one and told myself that I would not get the mod bug but I got bitten. This little thing has some potential that I wasnt aware of when I got it. It is probably a little faster than my mazdaspeed6 that I had. I cant find a place that makes a dp for this thing.
#7
#8
I did a Hahn catless DP/exhaust not to long ago. got it from a member here. definite HP gains. never tried it with just the catback though.
runs great
no issues at the dealer
It was really loud at first.
my dealer notice it was hitting against the gas tank area
after they repositioned it, it became a lot quieter. (imagine that)
most noticeable at warm up, downshift and of course WOT.
IMO during normal driving it is not that much louder then stock
like BartSS said it sounds great
runs great
no issues at the dealer
It was really loud at first.
my dealer notice it was hitting against the gas tank area
after they repositioned it, it became a lot quieter. (imagine that)
most noticeable at warm up, downshift and of course WOT.
IMO during normal driving it is not that much louder then stock
like BartSS said it sounds great
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