To all those that have replaced their header/manifold

***Nivek*** · 04-20-2005, 03:45 AM

Please tell us what you experienced and what supporting modifications you have.

I have the AP, Helix DP w/cat, and STi titanium muffler, and rally style gearing (4.444 final drive ratio).

I know this sounds crazy but I have too much torque, so it almost seems like I could really benefit from the slight loss in torque I have heard others mention and gain on the top end. What I would really like to know is how much did you notice that you gained on the top end. Can you compare the improvement to any previous mods you have done?

USAF_STi · 04-20-2005, 04:28 AM

I havent installed my headers yet, but it seams like people who have gained way more torque than horsepower.

Ol'SaltyBastard · 04-20-2005, 06:06 AM

I have an XX Tuning header/up pipe combo. I did this the same time I did my TBE, so I really couldn't tell you what the header alone does. I don't think it does too much at this point, but when the 20G gets installed, I think it will be doing what it's designed for. It will almost certainly make the exhaust note louder.

whiplash306 · 04-20-2005, 09:56 AM

Not sure what kind of top end you're looking for. But with my simple setup....XXTuning headers, Godspeed dp, Perrin pulley, Typhoon and StaticX grounding kit, I'm consistently outdoing C5 Vettes on highway pulls...took a ZO6 with exhaust up to 120 mph to finally pass me. Done it 3 times to date now(runs with C5 Vettes).....and my downlow GRUNT (torque) is also impressive IMO.

technica · 04-20-2005, 11:56 AM

Too much torque.. lol. Yeah I guess at some point you'll start breakin' stuff. Also I'd like to re-iterate what USAF said, torque will go up significantly with headers. At least that's the consensus on Nabisco aka Nasioc.

scrmblr2 · 04-22-2005, 09:37 AM

Ive got the following setup
apc cai
samco maf hose
vf 39
txs dp
txs hfcat
txs tappered mid pipe
txs 2.5" rfl muffler
gruppe-s v2 wrapped headers
helix uppipe

Too much torque, NO WAY. But the grunt donw low is VERY impressive. The car pulls nicely in any gear from about 2300 rpms and up. Still not running increased boost yet either. Need bigger injectors to do that, since I am current running 97% idc's around 5000 rpm. Tuned around the small injectors for now.

04-20-2005, 03:45 AM	#1
*Nivek* www.Subie.tv is niiice Posts: 10,067 IWSTI Addict since: Aug 2003 Trader Rating: (10)	To all those that have replaced their header/manifold Please tell us what you experienced and what supporting modifications you have. I have the AP, Helix DP w/cat, and STi titanium muffler, and rally style gearing (4.444 final drive ratio). I know this sounds crazy but I have too much torque, so it almost seems like I could really benefit from the slight loss in torque I have heard others mention and gain on the top end. What I would really like to know is how much did you notice that you gained on the top end. Can you compare the improvement to any previous mods you have done? This ad is not endorsed by this member. Please register or login to hide this ad.

04-22-2005, 09:37 AM	#6
scrmblr2 STI Driver Car: 05 Subaru WRX STi OB Fav Mod: Protune by Jorge Location: Chi Burbs Posts: 287 IWSTI Addict since: Oct 2004 Trader Rating: (0)	Ive got the following setup apc cai samco maf hose vf 39 txs dp txs hfcat txs tappered mid pipe txs 2.5" rfl muffler gruppe-s v2 wrapped headers helix uppipe Too much torque, NO WAY. But the grunt donw low is VERY impressive. The car pulls nicely in any gear from about 2300 rpms and up. Still not running increased boost yet either. Need bigger injectors to do that, since I am current running 97% idc's around 5000 rpm. Tuned around the small injectors for now. This ad is not endorsed by this member. Please register or login to hide this ad.

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04-20-2005, 04:28 AM	#2
USAF_STi Spec C Club Car: 05' CGM on silver Fav Mod: Ed's tune! Location: Bay Area NorCal Posts: 1,922 IWSTI Addict since: Sep 2004 Trader Rating: (2)	I havent installed my headers yet, but it seams like people who have gained way more torque than horsepower.

04-20-2005, 06:06 AM	#3
Ol'SaltyBastard Spec C Club Car: 1983 Mercedes Benz 3 Location: N. Kentucky/Cinci Posts: 1,464 IWSTI Addict since: Feb 2004 Trader Rating: (0)	I have an XX Tuning header/up pipe combo. I did this the same time I did my TBE, so I really couldn't tell you what the header alone does. I don't think it does too much at this point, but when the 20G gets installed, I think it will be doing what it's designed for. It will almost certainly make the exhaust note louder.

04-20-2005, 09:56 AM	#4
whiplash306 Spec C Club Car: '02 ZO6 & '86 GN Fav Mod: Registered Nurse, BSN Location: Central Texas Posts: 1,146 IWSTI Addict since: Oct 2003 Trader Rating: (2)	Not sure what kind of top end you're looking for. But with my simple setup....XXTuning headers, Godspeed dp, Perrin pulley, Typhoon and StaticX grounding kit, I'm consistently outdoing C5 Vettes on highway pulls...took a ZO6 with exhaust up to 120 mph to finally pass me. Done it 3 times to date now(runs with C5 Vettes).....and my downlow GRUNT (torque) is also impressive IMO.

04-20-2005, 11:56 AM	#5
technica Grassroots STI Racer Posts: 522 IWSTI Addict since: Feb 2004 Trader Rating: (0)	Too much torque.. lol. Yeah I guess at some point you'll start breakin' stuff. Also I'd like to re-iterate what USAF said, torque will go up significantly with headers. At least that's the consensus on Nabisco aka Nasioc.