I think most would. It’s also the install. That is why their reply of ‘take off your headers and we will recoat them’ is so infuriating.

Yep, I remember the original post. Jason worked with DT to get these headers made. They wouldn't even have been made if he didn't get involved. I've called him probably 20 times and he really does care and is a true enthusiast like mentioned above. My truck has now had TWO SETS of factory Toyota headers put on it! The Toyota headers are junk and crack in no time and you're looking at $1,600 from Toyota just for the headers without install. I'm now getting 3.2 more mpg over the stock setup with the new headers when I take trips. I've been through a lot and it's about time someone pays me back lol, with the better gas mileage helping my wallet at the pump!

I have a 3rd gen too with factory headers which are rusted but haven't cracked and don't leak. That truck is over 20 years old! I could care less what my headers look like as long as they don't leak. Toyota made a defective design with the factory headers. I've spent good money TWICE to replace factory POS headers. The facts are these cut my cost in half, give a bunch more power and better gas mileage and my truck is a lot more fun to drive. I see no problem here and I'm relieved. I have a very good technical background and can really add a lot of knowledge to this post on why's and how's but I'm going to stay out of it and tell you all to be happy and relax.

@Marfy Oh yea with out a doubt. Header install can be a pain even on an old 50s pick up, let alone an engine bay with no room.

I’m confused by your message of “I see no problem here”. So in your opinion, you think it won’t matter to have to replace these too as they are cheaper? That is serious rust in two years. Those air injection tubes are going to fail.

Clearly you have more cash at your disposal than me as I don’t like having to do things over and over...

I live up in Canada where they use salt on the roads, my 07 doesn't suffer from cracked OEM manifolds yet. Meanwhile if I pulled the trigger on these headers they would've dissolved within 2 years.

This is such a shame, my driver side cat is failing and I was thinking of buying the longtubes and going completely catless but I guess that's not happening.

So Doug Thorley warranty does not cover this? What the hell IS covered?

If Doug Thorley and Jason say their headers are made of stainless steel, and then sell you this crap that dissolves under your hood, then someone may be commiting fraud.

How did you pay for the headers? Some Visa cards have a surprisingly long dispute period if fraud is involved. Well over a year, sometimes two. Get a copy of your agreement and and check. Some guys here may be able to successfully get a chargeback done by their card issuer if the construction or warranty of these Doug Thorley headers was misrepresented.

You need to re read my reply. I have a 20 year old 3rd gen with factory rusted headers. They don't leak. This doesn't mean anything is going to fail, You are probably east coast and super wheel your truck in heavy mud. A truck that lives on the east coast will never look the same as one from FL, etc. There is no other choice for headers. You buy Toyota and it cracks. These solved your issue and mine. no one else makes a better part since it doesn't exist. You saved over $800 getting these instead of buying Toyota brand headers. Pat yourself on the back. I know hundreds of these have been sold and if this was an issue we would have heard about it since then because the shorties were out way long before these and they also have air injection 05+.

I have one of the first production runs with an 03' (produced 12/02) German delivery V8, purchased by the US treasury dept. and then it was imported to the states in 04'.
At over 140K (PO put these 35s on her, so it could be over 150K) miles these factory headers are still sounding great and aren't cracked as far as I can tell.
It makes me wonder if they were, as Jason put it "tweeners", where they used parts off another vehicle in the beginning of the production run.
All I can hope for is they are of better quality than subsequent years.
Do the Lexus versions crack too?

Idk, my girlfriend's already had the exhaust tick when we bought it at 215k and I took the manifold off and where the driver's front tube mated to the flange was visibly cracked and her truck is stamped as 10/02 so was around the same production date as yours. Course it has a lot more miles than yours.

No re-read required. You’re missing the point completely. Oddly enough, my originals weren’t cracked or leaking when I put these in originally. I bought into the lifetime hype as they were stainless and that mine would eventually break.

You’re argument they factory manifolds are more expensive and subpar so these are better is silly. They are still subpar and DT cut corners by using a combination of steel and stainless steel on their “stainless steel headers”.

Good call. I bought these December 2016 and installed mid year 2017. I’m doubtful I’ll be able to take advantage of this but others should look. I will still check too.

Hmmm curious. Toyota wouldn't have bolted the exhaust on at the port of entry right? That wouldn't make sense to me but, crazier things are done in the corporate world.
EDIT: Lol I'm just reachin for shit now, hoping mine don't crack soon.

I've heard that too. Maybe in your case that's true. I know mine failed at 118k. You can drive with them cracked but that can cause more issues the bigger the crack gets. Then when you have a hot date and you're embarrassed to pick her up and take an Uber instead of her hearing the worst sound in the world. Yes, I've been there! With how expensive gas is and how many more miles I'm getting to a tank of gas I'm happy.

I was actually going to buy these this week but not after seeing this post along with another person in the 4Runner group saying he spotted a leak on one of the welds.

I don't even care about performance, I want headers that will last another 200k. Tired of my factory headers leaking and hearing the ticking sound.

Check around too. I googled DT headers warranty and saw a couple other boards talking about some bad experiences. Their lifetime warranty does not seem to amount to anything. Same kind of deal, “we will recoat them”.