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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Tue, Oct-31-2017, 07:07:19 AM   #21
HassanEido
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Default Re: American racing headers Results

Damn son! Didn't see that coming! Congrats!
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Old Tue, Oct-31-2017, 08:47:07 AM   #22
Brian N
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Default Re: American racing headers Results

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Originally Posted by 95bullet View Post
Thanks Probably won’t get cams. Cant justify ~4-5k for the supporting mods to gain 15-30hp. Who knows though. Maybe one day.
I hear you on that. I think you'll gain good power from an airbox and freer flowing exhaust like you have planned. 340rwhp or more would surely be nice!

Congrats again. I would be stoked.
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Old Tue, Oct-31-2017, 10:11:32 AM   #23
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Default Re: American racing headers Results

Nice results!

Peak torque also shifted to 6000rpm area. Would be very useful on a track car!
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Old Tue, Oct-31-2017, 11:15:53 AM   #24
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Default Re: American racing headers Results

Finally some data! Thank you!
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Old Tue, Oct-31-2017, 01:49:16 PM   #25
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Default Re: American racing headers Results

Thank you
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Old Tue, Oct-31-2017, 02:09:47 PM   #26
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Default Re: American racing headers Results

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Squeaky clean, just tapped out at ~310hp lol


That's very interesting. I assumed removing the air filter would provide gains up top, but not over the entire rev range!
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Old Tue, Oct-31-2017, 02:28:10 PM   #27
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Default Re: American racing headers Results

Excellent work dialing her in G!

I really think you'll make some incredible gains with cams, valves, and even throw in a valve seat regrind (good for new valves anyway). With the [flow] mods you have now, including airbox, you'll really exploit the gains cams and valves can make on this engine.
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Old Tue, Oct-31-2017, 02:28:41 PM   #28
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Default Re: American racing headers Results

I got excited, looked up the price of the system, then quickly closed the tab. Even if there are multiple sources confirming significant gains, it’s gonna be a while before I adopt because of price.
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Old Tue, Oct-31-2017, 02:34:43 PM   #29
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Default Re: American racing headers Results

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I got excited, looked up the price of the system, then quickly closed the tab. Even if there are multiple sources confirming significant gains, it’s gonna be a while before I adopt because of price.
Same. They've always been one of the best brands available in the domestic world, but the cost doesn't seem in line with their domestic offerings. With that said, if the gains are consistent then it's not a bad cost per horsepower ratio compared to what else is available for this platform.
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Old Tue, Oct-31-2017, 02:46:41 PM   #30
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Default Re: American racing headers Results

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Originally Posted by TboneM3 View Post
Great info, thanks for sharing! Then we'll have more with tjkenny and have a much better feel for these.

Would like to see catted too, hopefully someone will have one of those soon.
I have the catted system on my car, just waiting on dyno time...
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Discussing American racing headers Results in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)