Off Road Y-Pipe - V8 4runner

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bzettler83

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I've been searching and cant seem to find anything for the V8, I see the V6 all the time but nothing for the V8.... Anyone have any recommendations?
 
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So I was under the 4runner last night and in my browsing I can't find any new/good info about this.

There are a few decent cat-back options available for the Runner, but the BIGGEST problem is that Y-pipe. I have only seen a few options of people addressing this problem. How can this not be a much more common modification?

I have been looking and can't find any replacement options except for the V6

I saw a very old thread where someone discussed making a replacement unit, but haven't seen anything new on it and never saw anything go into production.

You guys have any more info? I am half tempted to just go make one and produce an option, even if its just a "off road" option w/ no cat and a resonator instead...
 
I couldn't find anything either, so I am having a local shop build me headers and a Y-pipe to fit into my Gibson Cat-Back. Y-pipes are usually cheap to have made though, headers not so much...lol
 
yeah, headers are not cheap to have made "custom"

I'm curious as to why the headers available for the same motor on the Tundra don't fit? Has anybody tried to take those and modify them to make them fit?

Very few people have done anything with exhaust up front - for a vehicle that has been around this long I am very surprised at the lack of aftermarket options regarding this stuff!
 
tollboothwilley said:
yeah, headers are not cheap to have made "custom"

I'm curious as to why the headers available for the same motor on the Tundra don't fit? Has anybody tried to take those and modify them to make them fit?

Very few people have done anything with exhaust up front - for a vehicle that has been around this long I am very surprised at the lack of aftermarket options regarding this stuff!
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One guy made Tundra headers fit, with lots of work, rerouting dipstick tube, and trimming flange on the steering shaft... Plus, have you seen the cost of those things?! Yikes. Lol
 
Yeah I made TRD Tundra headers fit but only cause I trade the guy for headers for a $100 light bar so it was worth it. I then had a custom Y made. I don't think a fair exhaust shop would charge more that say $200 for a new Y-pipe if ya really want one.
 
There you are [MENTION=80027]Nathana92[/MENTION]. Was at work and couldn't look you up to link properly. Ya, if it hadn't been for your lucky low cost, would've been bad. The custom ones I'm going to get made are going to cost me 2k. :-( but worth it in my eyes. Stainless steel, custom made for my truck, and stock ones would cost me close to that even if I put them in myself, which I don't have the tools, time or garage right now to do it in.
 
There are other aftermarket headers besides the TRD version - I'm sure they are all very similar in design. Aside from the dipstck you said trimming the flange on steering shaft. What else needed to be done?

Also - Why is there no tuning software or piggy-back systems being installed? There has got to be a lot more potential in this motor than the stock output. I'm putting down 30% more with a motor that is 35% smaller.
 
I heard from Doug Thorley that their Tundra V8 headers work on our 4runner but I forget what you have to do in order to install. Probably as he mention, the dipstick relocation and trimming.
 
tollboothwilley said:
There are other aftermarket headers besides the TRD version - I'm sure they are all very similar in design. Aside from the dipstck you said trimming the flange on steering shaft. What else needed to be done?

Also - Why is there no tuning software or piggy-back systems being installed? There has got to be a lot more potential in this motor than the stock output. I'm putting down 30% more with a motor that is 35% smaller.
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It wasn't exactly trimming of the steering shaft as it was dimpling the actual pipe so the shaft could spin. This may or may not be an issue depending on design of the header.

I'm also TRD supercharged and run a MAPecu3 tuner to control fuel and timing. I'm sure that someone could add a tuner to a truck with just headers and see an increase. I initially added the headers as it was the cheapest route to fix the exhaust leak. Now I have well over 300 hp so that's just the way it goes haba
 
Nathana92 said:
It wasn't exactly trimming of the steering shaft as it was dimpling the actual pipe so the shaft could spin. This may or may not be an issue depending on design of the header.

I'm also TRD supercharged and run a MAPecu3 tuner to control fuel and timing. I'm sure that someone could add a tuner to a truck with just headers and see an increase. I initially added the headers as it was the cheapest route to fix the exhaust leak. Now I have well over 300 hp so that's just the way it goes haba
Click to expand...

Very few people have any tuning done - and I know with the way the exhaust is, along with the size of the motor, there should be ample room for improvements. Why did you go with the MAPECU3 ? What other options are common for the Toyotas?
 
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