Premium Member Tazmool Posted June 14, 2020 Premium Member Share Posted June 14, 2020 Hello Everyone, Just a public service announcement, As the topic title stated, I installed my Dominator header onto my T7 last night, and took it for a ride today. My header is combined with a Huzar High Exit exhaust, so its a "full system". Also, my ecu will be going out for a re-flash this week, so I only have about 200km on the combo. Two Problems during the install. 1. Once installed, the outer header was touching the right-front (unused) engine lug. I don't think this is a good thing, engine vibration could eventually damage the header wall, or maybe not. I removed the header, tried adjusting the install, using shims and washers to move the header away from the engine no luck, I then used a dremmel to remove a mm or two of the casing aluminium (again, this lug is not used for anything, just sticks out there). Now there is plenty of clearance. 2. Once everything was installed, I found out that my B&B OffRoad skid plate does not clear the header! AAARGHHHH!!!!!! This was, very, very dissapointing. The clearance issue is due to the placement of the retaining springs on the header (there are two springs, holding the header to the collector pipe), they are on the bottom of the header (facing the ground) the interference is slight, you would never notice it untill installing a very form fitting skid plate like the B&B. The only way to fix this, that I can see, is to cut off the spring lugs, and weld them onto the top of the header (between the header and engine, there is enough clearance). I don't have access to a welder that can do Stainless Steel (would need a tig probably), plus I don't want to blow holes in the brand new exhaust... (my welding skills are "meh") So, solution for now is to re-install the oem light-duty skid plate, which clears the header perfectly. I guess the only up-side is that the exhaust saves weight, and the oem light skid-plate is much lighter than the B&B skid plate, so savings weight. Riding the combo: Db-Killers out. You can definitely notice a bump in performance, the bike is more lively and wheelies much easier than before. The bike also seems to be running lean, its burbling and back-firing a good amount on-off-on throttle, and with a closed throttle. I would recommend doing a flash or something to adjust the fueling. The sound of the combo is nice, but a tad too loud/aggressive for my liking. I was torn, as it does sound nice, but just a tad too loud. Half way through my ride, I decided to install the dB-Killer, and the sound is FAR better imho. Its hard to tell due to the perceived less-noise=less-power thing, but there does seem to be a slight drop in power output, but its very slight. The bike still pulls nicely, and wheelies on command. I think I will leave the dB-Killer in. Conclusion: I do like the exhaust combo, and install effort was very low, despite the bit of dremmel work needed. The exhaust is staying on, and the ecu is getting removed tonight and being shipped to 2WDW for a re-flash tomorrow. The ecu flash, hopefully will bring back a bit of the no-dB-Killer snappieness, remove the heavy engine-braking & on-off-on throttle snatchiness, remove the off-throttle backfire, and generally make the bike better all around. In the down-time as I wait for the ecu to come back, I'll do the 1st service on the bike, maybe pull the header again and get the mounting lugs welded on top, and a few other things, as well as I have another MAJOR (unrelated) project I've had on the go for about a year now, that needs to be done this summer. Tazmool 2 Link to comment Share on other sites More sharing options...
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