Rockauto Budget Y-pipe
#1
Information Regurgitator
Thread Starter
Rockauto Budget Y-pipe
Hey all. Thought I would share this budget y-pipe I picked up from Rockauto.com. The brand is Davico Manufacturing. It was $38.79 plus shipping which was $14.xx for me. I was skeptical for that price but I needed something in a pinch since my HKS one is falling apart( info to come in another thread). Upon receipt I was pleasantly surprised at the build quality but disappointed in the pipe size. Inlet is 2-1/8" O.D. vs. 2-1/2" for the HKS. Internally the split at the Y looks decent. The pipe to the mufflers is 1-3/4" O.D. vs. 2" on the HKS. Reason I say disappointed was this was listed as a direct replacement part for a turbo car. I may have mistakenly thought their stock pipe sizing was bigger than this. It is thinner walled as well. None the less this would be an ok replacement for a y-pipe on a stock n/a if you're tight on funds. Probably not a performance upgrade. Also the other bad is though the bends are smooth they do decrese the pipe size unlike true mandrel bends. Like I said this in a temporary soloution for me till I get a welder and learn to weld. Then I will order some nice bends and build an exhaust of some type. Here are some pics.
#4
Information Regurgitator
Thread Starter
#5
Information Regurgitator
Thread Starter
I could see how with some welding/fab. work to smooth out the transition into this so it's not an abrupt change like mine currently is it might not be too bad. Plus for the price one won't feel bad about hacking it up.
#6
MECP Certified Installer
I wouldn't touch that y-pipe with a 10 foot pole, it looks terrible.
I'd rather spend the money and have one made. I understand being on a budget, trust me, but man that looks bad.
I'd rather spend the money and have one made. I understand being on a budget, trust me, but man that looks bad.
#7
Information Regurgitator
Thread Starter
My other thinking was I'd be a guinea pig for you guys and get it and post up pictures so if anyone else saw it and thought about getting it they might stumble on my thread. Then they could decide whether it was terrible or usable from better pictures than on rockauto's site.
In the end I'll do as you suggest and make my own.
Trending Topics
#8
Heartless GXL
iTrader: (18)
I am absolutely not the most experienced person on here, but the one thing I learned was to listen to my father when he said that unless it is a high-end aftermarket part 90% of the time you're going to have to modify it a little bit to fit. The first time I ever tried to put up a dual cat back was a aftermarket pipe job with some Midas mufflers, and when I put it up the driver side was scraping the bumper like crazy in the passenger side was hanging about 3 inches too low after that I never again trusted anything but name brands for exhaust parts. All of my RB stuff and Borla I have been absolutely on point
Edit: I am not stating that Borla or RB super high-end, but they are surely repeatable companies
Edit: I am not stating that Borla or RB super high-end, but they are surely repeatable companies
#10
Information Regurgitator
Thread Starter
Here is a picture from under the car after mounting and one from the rear though it doesn't really pertain to the Y. Please ignore the dirt and the fact the car needs paint.
#12
Rotary Freak
iTrader: (1)
My guess is it may pick up a little in low and mid-range, since the narrowing will force higher exhaust velocity and better scavenging as a result, but the reduced capacity and the turbulence from the abrupt transition to narrower pipe are bound to hurt the high end - probably 5000rpm on up. I saw the opposite when I went to a larger, freer-flowing exhaust - a bit less low/mid-range torque, but more power from about 5000 on, and the engine would pull strong to about 8600, where before it ran out of breath at 7800-8000rpm.
#13
Living on the North Coast
iTrader: (31)
That is the same stock replacement unit that came on my car. The PO had taken the car to the Mazda dealership and that is what they had installed along with the same brand mufflers. It was nice and quite with the stock exhaust manifold and cats as well as the Catco replacement cats. I may try it with the CorkSport header and main cat to see if it is any quieter than the over sized Borla pipes and straight through resonators.
#14
Information Regurgitator
Thread Starter
Here is somewhat of a companion thread to this one where I give a little more detail on the results. https://www.rx7club.com/2nd-generati...ement-1079600/ Basically I can't really tell much if any difference. Still pulls strong all the way to redline. My thinking is the HKS were a straight thru style but not a true straight thru muffler. See attached picture. Hence now the mufflers have better flow but now I have the abrupt pipe size change and reduced pipe size of the Y-pipe so it all becomes a wash. The restriction of the Y is offset by the increased flow of the mufflers. I am curious to see if I notice any change once I get a proper setup.
Thread
Thread Starter
Forum
Replies
Last Post