downpipe smell

bsgts

Member
after putting on a downpipe does it give out a bad smell? is it strong enough for the cops to smell it and pull you over?
 
bsgts said:
after putting on a downpipe does it give out a bad smell? is it strong enough for the cops to smell it and pull you over?
Ya its pretty bad... As long as you don't floor it.. the cop shouldn't smell it until hes probably 1 - 2 cars behind you (while cruising). I'd just custom weld a hi-flow cat if possible.

But under WOT... You can smell that 20+++ cars away.
 
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bsgts said:
after putting on a downpipe does it give out a bad smell? is it strong enough for the cops to smell it and pull you over?
I've got a 3" S pipe back and yes it stinks. but SO worth it.
 
no cats = stinky pipes.
I will no soon enough just how bad it is once i get my exhaust installed.
I will probably be adding a hi-flow cat soon.
 
bsgts said:
does everyone with a downpipe have this problem? hwat does it smell like
Smells like fuel. Everyone with downpipe w/o cats have that problem. Even some Hi-flow cats will stink a little but its still legal.
 
my gas mileage stayed the same except on long highway trips. i get MUCH better gas mileage. about 35 mpg on a trip from Ft. Laud, FL to Savannah, GA.
 
GotBoost said:
my gas mileage stayed the same except on long highway trips. i get MUCH better gas mileage. about 35 mpg on a trip from Ft. Laud, FL to Savannah, GA.
How much do you get on the streets? Currently im getting 25 mph on the streets with fmic/d/p/exhaust and intake. Also i like to hit it a couple of times here and there.
 
How about if you still have 1 cat? I plan on installing my wanger header when it arrives and keeping the 1st cat but opting to go for the cheaper mid-pipe which is the one without the cat. So would it smell and how bad?
 
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I have the Apex downpipe with high flow cat. No smell, a slightly deeper/louder sound, and on rare occasions, a little backfiring
 
jersey_emt said:
I have the Apex downpipe with high flow cat. No smell, a slightly deeper/louder sound, and on rare occasions, a little backfiring
jersey...what kinds of gains did you get? Also, I've read so many things about downpipes, i can't keep all the info straight. With a dp/high flow cat, will you get a cel and/or can you still pass inspection? Basically, I'm not sure if it's the dp that has the o2 bung or if it's somewhere else.
 
No CEL, should pass emissions.

Awesome power gain...the car pulls much harder...and it pulls all the way to redline.
 
I say go with the single hi-flow cat....to maintain legality, and to not have to bother with a MIL eliminator.

The ~4 HP difference just isn't worth the possible trouble.
 
I am running a 2.5 Apex catless. No smell or CEL as of yet. Each region has different fuel additives at the pump, that could be the cause of the smell, which could be increased with the use of an aftermarket downpipe.
 
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