2004 Civic DX Intake/exhaust/headers
Thread Starter
Registered!!
Joined: Jan 2018
Posts: 1
Likes: 0
Rep Power: 0 
2004 Civic DX Intake/exhaust/headers
Hello Gang,
My oldest son got a 2004 civic dx (automatic trans) for his 16th bday. He's had it about 7 months and now wants some "go faster" parts for his car. We ordered the following for him.
Spec D System Exhaust (stainless) with titanium blue tip
Stainless headers
Velocity Intake
My question is, will I need to get tuning done? If so who could you rec'd in the Chicagoland are OR is there a decent mail order tune I can get?
Thanks!
My oldest son got a 2004 civic dx (automatic trans) for his 16th bday. He's had it about 7 months and now wants some "go faster" parts for his car. We ordered the following for him.
Spec D System Exhaust (stainless) with titanium blue tip
Stainless headers
Velocity Intake
My question is, will I need to get tuning done? If so who could you rec'd in the Chicagoland are OR is there a decent mail order tune I can get?
Thanks!
"Marge, anyone could miss Canada! All tucked away down there."
Joined: Feb 2016
Posts: 9,639
Likes: 1,283
From: Barrie, ON Canada
Rep Power: 222 
Re: 2004 Civic DX Intake/exhaust/headers
you could try but you most likely wouldn't see/notice any difference, car will just be louder
OF top 99.5% creator (Formerly of the Puffinblunts variety)
Joined: May 2012
Posts: 3,634
Likes: 109
Rep Power: 211 Re: 2004 Civic DX Intake/exhaust/headers
..If you purchased Ebay headers they are junk and will most likely crack within six months. Plus you may run into fitment issues. Engine swap or forced induction (turbo, supercharger) is the only way for power gains. Last edited by Wankenstein; Jan 30, 2018 at 11:40 AM.
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
Posts: 32,017
Likes: 256
From: Midwest. Aiming about mid-chest
Rep Power: 518 Re: 2004 Civic DX Intake/exhaust/headers
Loudness increases
Actual power/performance and fuel economy decreases
LOL
Actual power/performance and fuel economy decreases
LOL
Joined: Aug 2003
Posts: 21,620
Likes: 1,252
From: Las Vegas, NV
Rep Power: 512 Re: 2004 Civic DX Intake/exhaust/headers
More like 1-5hp loss in the low end, no gain mid range, and a slight gain of 1-4hp at the top (>6000RPM; D17 has a 6800RPM redline and 7200RPM rev limit).
If you D17A2 head swap and crower stage 1 cam it, you'll see combined results. There's a dyno sheet floating around the internet of a D17A2 (stock, 127BHP/110WHP) basically recouping losses from the transmission (i.e. making ~127whp after intake/header/exhaust with a crower stage 1). Should also mention it was a gain across the RPM band, not just low/mid/high.
If you D17A2 head swap and crower stage 1 cam it, you'll see combined results. There's a dyno sheet floating around the internet of a D17A2 (stock, 127BHP/110WHP) basically recouping losses from the transmission (i.e. making ~127whp after intake/header/exhaust with a crower stage 1). Should also mention it was a gain across the RPM band, not just low/mid/high.
Joined: Dec 2008
Posts: 15,179
Likes: 1,606
From: TN
Rep Power: 367 Re: 2004 Civic DX Intake/exhaust/headers
No need tune. ECU will not accept tune anyway.
1-5 HP if much.
Wait, does the header on DX like the LX? If so, it have a cat in it. If the new header don't have the cat, you better check your local emissions law.
It will be louder.
1-5 HP if much.
Wait, does the header on DX like the LX? If so, it have a cat in it. If the new header don't have the cat, you better check your local emissions law.
It will be louder.
Thread
Thread Starter
Honda Civic Forum
Replies
Last Post
omf187
South Cali
20
Oct 9, 2008 10:13 PM
CvC-v01
General Automotive Discussion
50
Jan 30, 2004 10:12 PM
slammed2k2
Parts and Products
8
Jun 12, 2002 11:32 PM
slammed2k2
General Honda Civic Forum Archive.
12
Jun 6, 2002 02:57 PM
