Notices
Evo How Tos / Installations Post or link to your detailed how to / installation articles in here. If you have any questions regarding the how tos, feel free to post them in the Request sub-forum.

Helix Down pipe install

 
Old Jan 11, 2004, 10:39 AM
  #1  
Evolved Member
Thread Starter
iTrader: (1)
 
simevo's Avatar
 
Join Date: Aug 2003
Location: SF, CA
Posts: 591
Likes: 0
Received 0 Likes on 0 Posts
Helix Down pipe install

Total time from prep to install and clean up took about 1 Ĺ hours. Difficulty: easier than changing a header on a Honda. Only difficult part is knowing how to put the DP back on if you work alone with a house jack.

1. You will need an extension (about a foot) to reach the spring loaded bolts at the donut gasket point. You do not need to take the plastic under tray off.
2. You need to take the two tie bars off.
3. You will need a factory jack to hold up the cat and mid pipe since they donít have any hangers once the DP is off otherwise it will damage the 2nd O2 sensor wires. (Pic)
4. Loosen all the bolts i.e. spring bolts, hanger bolts and the bolts to the cat to the point where you can unscrew them by hand. Then unscrew the hangers. While holding the DP so it wonít drop, unscrew the rest of the bolts.
5. Once the DP is off make sure the donut gasket is still on the O2 housing.

You can use the 3in gasket to the cat or the stock gasket if you have a stock cat. I prefer the stock gasket since the stock catís opening is small. The 3in gasket will only seal towards the edge of the cat while stock gasket will seal everything. I would save the 3in gasket for future use with 3in cat.

Install is just doing the opposite but must be careful how the bolts go on. Screw all the bolts with hand but only to sit and align the DP (donít tighten all the way). Once all the bolts go in and the DP has a clean install, tighten the bolts; but when tightening the spring loaded bolts, you will need to tighten them together that is tighten one side a bit then the other side and so on. This is if your DP uses the stock donut gasket since donut gaskets are round and need to sit properly.
simevo is offline  
Old Jan 11, 2004, 11:07 AM
  #2  
Evolved Member
Thread Starter
iTrader: (1)
 
simevo's Avatar
 
Join Date: Aug 2003
Location: SF, CA
Posts: 591
Likes: 0
Received 0 Likes on 0 Posts
Helix DP review

The Helix DP is very nice and the quality is very high.
You will not notice much power loss at low end but 2k and above feels alot better and at high rpm Evo pulls harder than before.

This DP or any other 3in DP will not clear the oil pan by much. Helix fits very tight since it clears the factory tie bars. (Pic)
In fact, the Helix I got was rattling against the upper chasis. It sounds just like a grinding noise due to high vibration of the engine. You would have thought the thing was touching the rear drive shaft or the clutch was going bad. This problem was easily fixed by slight mod on the hanger rods (I have experience in making parts fit when they don't from all the Honda days ).

If you run tracks, 70mm DP is the way to go such as the Works or HKS. But for those daily drivers who only need that extra power once in awhile 3in is great.

Pros:
Helix will clear the tie bars, very nice quailty, and great price.
Cons:
Helix fits very tight. If the tolerance is off just a bit, it will touch. It's not for track use as it sits close to oil pan.

I haven't seen other DP upclose so can't compare it.
Overall, I am pleased.
simevo is offline  
Old Apr 12, 2004, 10:12 PM
  #3  
Evolved Member
 
LancerEvoMR's Avatar
 
Join Date: Aug 2002
Location: New Jersey, USA
Posts: 2,088
Likes: 0
Received 0 Likes on 0 Posts
Discuss thread here
LancerEvoMR is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
rydogg008
Evo X How Tos / Installations
11
Jan 31, 2015 06:19 PM
BEISSEN
Evo Engine / Turbo / Drivetrain
8
Oct 22, 2010 09:02 PM
Steve_P
Vendor Service, Parts & Tuning Review
5
Feb 28, 2010 04:37 PM
Jameson_IXMR
Evo How Tos / Installations
8
Jan 29, 2009 11:52 PM
BushBurninEvo
Evo Engine / Turbo / Drivetrain
17
Jan 15, 2005 01:10 PM


Thread Tools
Search this Thread
Quick Reply: Helix Down pipe install


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.