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Engine & DrivetrainDiscussions about the engine and drivetrain of your vehicle.
This is a discussion thread titled "Y-Pipe", within the Engine & Drivetrain forum, part of the Technical & Vehicle Assistance Forums category.
Installed the system yesterday and it sounds awesome and looks bitchin. While changing out the old I noticed this y-pipe connection bringing both headers together under the truck. This is a horrible piece of engineering. At one point the pipe is cut down to 1" tubing. This has to be one of the biggest restrictions in the entire system.
Has anyone replaced this? Does any company make a replacement piece? If this piece was made better it would really open up the system for ALL our trucks.
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2007 Toyota Tundra 5.7L v8 4wd TRD Limited
Installed the system yesterday and it sounds awesome and looks bitchin. While changing out the old I noticed this y-pipe connection bringing both headers together under the truck. This is a horrible piece of engineering. At one point the pipe is cut down to 1" tubing. This has to be one of the biggest restrictions in the entire system.
Has anyone replaced this? Does any company make a replacement piece? If this piece was made better it would really open up the system for ALL our trucks.
JBA does make a Y-Pipe replacement (Part no 2010Y if I recall correctly), but I don't think anyone has managed to do any stand-alone testing with it. Opinions seem to be mixed with it, but I don't know if there's been any substantive testing. I have it on my truck, but I had it installed with the headers and exhaust so I couldn't tell you if it helped or not.
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Genthar
Rhino Lining, Waag one piece grille guard and wheel to wheel nerf bars, 3M Xpel on headlights, front corner lights, and foglights, Valentine One radar detector, XM Satellite radio, Navigon 7100 GPS, Lightforce 240 Blitz aux lights, Aux. reverse lights.
AEM Brute force intake, courtesy of AEM Power and TundraSolutions.com
Teamwest Coilovers, Camburg Upper A arms, Daystar Steering Rack Bushings, Total Chaos Diff Drop spacer, JBA Headers, Y-Pipe, and EVOL exhaust.
I take it when you purchase the headers it does not come with that piece?
You can either buy it together or separate. I'll save you the hassle of searching by referring you to the "TS store". CLick on the link at the bottom of the page.
I take it when you purchase the headers it does not come with that piece?
No and Yes. The JBA headers do not come with the Y-Pipe. The TRD Headers do. I purchased a JBA Y-Pipe from here: http://www.centuryperformance.com/de...t_id=JBA-2010S
They do not list the Y-Pipe but sell it cheaper than anywhere I have found ($165 + Shipping).
I installed my headers first, then the Y-Pipe about 6 months later. I DID notice a difference, but have not had a dyno.
Also, I agree with your assessment of the stock Y-Pipe: It seems VERY restrictive. I compared the two while off the truck and was amazed at the difference.
Toyota's engineers rarely produce "a horrible piece of engineering." It looks to me like the narrowed-down section acts like a venturi nozzle that pulls a slight vacuum on the other pipe. Maybe not, but few if any aftermarket Y-pipes produce any power gain.
Ken
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You get what you inspect
Not what you expect.
S&S Long Tube Hi-Torque Headers
TRD/Eaton Limited Slip Differential
Gibson exhaust system
Hellwig Rear Antisway Bar
Sylvania Xenarc H.I.D. X1010 Auxiliary Low Beam Driving Lights
Schaeffer Engine Oil, ATF, Differential Oil
Racor LFS22825 full-flow transmission filter
Towing a 21' Bigfoot trailer using a Hensley Arrow hitch, Jordan brake controller, McKesh mirrors
I thought the Y pipe would not fit on the 04 and above years, since they changed the position on the cats and something else? I thought it was on one of the threads in here. Along with the TRD headers, you have to cut and weld alot more since they changed things up. or am I just talking crazy.
EDIT:
Here is a thread that states there are 2 different lengthed y-pipes that JBA makes. Thread
I have the Y pipe from JBA, I doubt it would help much unless you are S/C'd and pushin 9 psi. These small block engines seem to have better low end with some backpressure.
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Unichip'd TRD Supercharger & 5.9 Overboost Crank Pulley,TRD Boost guage and Oak color matched pod,TRD LSD,Valvebody Upgrade by IPT in NY, JBA headers,Y pipe, K&N(Evol) SS catback exhaust, Helwig Rear antisway bar, Rear custom Leafpack,TRD Coils,Cornfed Spacers's with Y/B Bilsteins,Westin Outdoorsman Bushbar and Nerf Tubes, TRD Ivan Stewart 16X8 Rims and 285/75/R16 Revo AT tires.Pioneer 5500 MP3 Head unit/Q-Logic sub enclosure with dual crossfire subs/ 700 watts of Crossfire Amps/Bazooka 6.5's and 5.25's in Kickpanels/ CodeAlarm Remote starter/antitheft system.
Installed the system yesterday and it sounds awesome and looks bitchin. While changing out the old I noticed this y-pipe connection bringing both headers together under the truck. This is a horrible piece of engineering. At one point the pipe is cut down to 1" tubing. This has to be one of the biggest restrictions in the entire system.
Has anyone replaced this? Does any company make a replacement piece? If this piece was made better it would really open up the system for ALL our trucks.
Ive made a custom one before out of 2". I just cut the tubing at the ds flange and bent a section, cut the PS back a bit, and brought them together with a piece of 3" tubing flared out in a merge style. The customer already had a 3" exhaust, and I had just finished installing JBAs on it as well. The boss delivered the truck back to his friend after work and said he was impressed at the power for a gas motor.
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Mods: Donahoe TCF coilovers, TC upper arms, rear Bilstein 5100s, Downey headers, 3" exhaust with Spintech Prostreet, BFG MT 285-70-17s on Helo Maxx 6 Chrome, Electric Brake controller. Tsunami RCA converter, PIE AUX adapter, LA Sound amp, MTX 10" band pass sub.
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Y-Pipe
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