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Old 03-20-2012, 01:11 PM   #1
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Shorty headers

About how much horsepower do they add and will it change my exhaust tone?
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Old 03-20-2012, 01:16 PM   #2
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Re: Shorty headers

Not much for HP, but they will give a slightly deeper tone.
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Old 03-20-2012, 01:19 PM   #3
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So I'd be best just to stay away from them?
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Old 03-20-2012, 02:04 PM   #4
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Re: Shorty headers

as i understand it, your only BIG hp gain comes from the muffler. even duals don't make much difference. i've heard headers buy depth in sound. if you were putting out 500rwhp, then long tube headers would be a must, but at 300rwhp you're talking a couple of horses maybe?
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Old 03-20-2012, 02:18 PM   #5
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Quote:
Originally Posted by jamin22786
as i understand it, your only BIG hp gain comes from the muffler. even duals don't make much difference. i've heard headers buy depth in sound. if you were putting out 500rwhp, then long tube headers would be a must, but at 300rwhp you're talking a couple of horses maybe?
This is absolutely wrong. You get the "BIG" HP from the headers. The mufflers are where you get the sound from. If your looking to get any HP from an exhaust system headers are a must.
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Old 03-20-2012, 02:22 PM   #6
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Quote:
Originally Posted by jamin22786
as i understand it, your only BIG hp gain comes from the muffler. even duals don't make much difference. i've heard headers buy depth in sound. if you were putting out 500rwhp, then long tube headers would be a must, but at 300rwhp you're talking a couple of horses maybe?
Take in mind this is a v6 with around 190 to the wheels give or take. I have JBA shortys and the sound is noticeable and deeper. The performance is noticeable as well. Slight acceleration gain from the line and a lot more of acceleration inbetween 60-75 over stock exhaust manifolds

---------- Post added at 02:22 PM ---------- Previous post was at 02:21 PM ----------

And sorry I can't give you any numbers but its totally worth the investment IMO
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Old 03-20-2012, 02:29 PM   #7
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Re: Shorty headers

Quote:
Originally Posted by Brett Greene View Post
This is absolutely wrong. You get the "BIG" HP from the headers. The mufflers are where you get the sound from. If your looking to get any HP from an exhaust system headers are a must.
I've had headers for every car I've ever owned. I think it depends on the car. For the V8, yeah. For a honda civic where all the exhaust meets 2 inches from where it leaves the engine, yeah. for the s197 V6 the design was pretty decent to start with. if you do it, you need to go all out to get the pay off, ie ceramic long tubes, no cats, duals.

think of it this way, the goal is to reduce restriction/back pressure, where is their the most restriction? muffler, then cat converters (depending some on design), then headers. To make header change pay, you need to make a significantly better flow of air, hard to do that with short tubes on a s197 V6.

---------- Post added at 02:26 PM ---------- Previous post was at 02:24 PM ----------

i should mention, i understand cutting out the cats to be a bad decision for V6 because of raspy sound issues

---------- Post added at 02:29 PM ---------- Previous post was at 02:26 PM ----------

Quote:
Originally Posted by Beau View Post
Take in mind this is a v6 with around 190 to the wheels give or take. I have JBA shortys and the sound is noticeable and deeper. The performance is noticeable as well. Slight acceleration gain from the line and a lot more of acceleration inbetween 60-75 over stock exhaust manifolds

---------- Post added at 02:22 PM ---------- Previous post was at 02:21 PM ----------

And sorry I can't give you any numbers but its totally worth the investment IMO
is that before dual conversion? car looks sweet, btw
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Old 03-20-2012, 02:31 PM   #8
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Quote:
Originally Posted by jamin22786

I've had headers for every car I've ever owned. I think it depends on the car. For the V8, yeah. For a honda civic where all the exhaust meets 2 inches from where it leaves the engine, yeah. for the s197 V6 the design was pretty decent to start with. if you do it, you need to go all out to get the pay off, ie ceramic long tubes, no cats, duals.

think of it this way, the goal is to reduce restriction/back pressure, where is their the most restriction? muffler, then cat converters (depending some on design), then headers. To make header change pay, you need to make a significantly better flow of air, hard to do that with short tubes on a s197 V6.

---------- Post added at 02:26 PM ---------- Previous post was at 02:24 PM ----------

i should mention, i understand cutting out the cats to be a bad decision for V6 because of raspy sound issues

---------- Post added at 02:29 PM ---------- Previous post was at 02:26 PM ----------



is that before dual conversion? car looks sweet, btw
That's with just CAI, and tune. Just a rough estimate! All are different. But yes once again. Get the headers! Put them in myself using hand tools and a couple jacks. Just took short of 4 hours! And thanks man I appreciate it
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Old 03-20-2012, 03:31 PM   #9
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Re: Shorty headers

Do NOT remove the cats on the 4.0. Everyone I know who did it regretted it; terrible sound to the exhaust and no performance benefit on the 4.0.
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