I finally finish installing my header yesterday it took me 2 days so if you dont have mechanical experience just take it to a shop.
I'm not responsible if anything goes wrong do this at your own will
Tools you will need to finish this installation - set of socket wrenches from 10 mm to 14mm - set of wrenches from 10mm to 14mm - an adjustable wrench (for the sensor on the exhaust) - extension for socket wrench 20 - pipes, long pipes -- not too long, just fat enough to fit the wrench handle. this will be used for more leverage. it makes the installation much easier
Step one First you need to disconnect your negative battery terminal (10 mm) (Note: you should just remove the whole battery, its going to have to come out later on)
Step two Under the car you need to remove your dirt guard, to make it easier to reach jack up the car but dont lift it off the ground, you dont need to do this till later, just enough to give you room to get under and take out all the bots and nuts and shit, ill point were they are in the picture below
Picture two on each side of the car were your wheel is located take out the 3 screws or what ever they are out of the way, ill point them out do this on both sides
left side sorry the harness in on the way but you can find it if you got this far also i removed the battery to get to this bolts, you should do the same
to make this easier use the pipes i told you to get put them at the end of the wrench and this should make it a lot easy to break the bolts and save you a lot of strength (note from now on you should use this method to break every bolt)
Its time to get under the car Jack up the car and make sure you put it on jack stands you dont want to die trying to install something. Now we are trying to get the bottom part of the heat shield off there should be only four on this one the first picture are the ones closes to the engine and the one ones are away from it
Note I tried everything I could to get the heat shields out at this point but its kind of impossible so dont try it would be a waste of time (credit for the last 2 pictures go to the person that made the other installation guide on the header)
Now remove the other head shield there are 2 nuts 10mm right under the hood here is a pix now there should be about 2 more nuts under the car get them off before you can remove that heat shield I forgot to take a picture of it sorry but if you got this far you can figure it out
Now with all of this out you should be able to try to get the head shield out im not saying its going to be easy because even with this it was hard what I did was take the top head shield out of the top of the car and when it was not coming out I started to harmer it and it came out and the bottom one just pull it and move around to get it out
Now here is the biggest bitch to do, getting the header screws out There are 5 here is the picture (Note the only screws you can get from above the car is the one in the middle I took all the other ones from under the car (picture credit to the other install guide)
Now on the other installation guide they say to remove some shit that has to deal with the suspension but I dont think he remove his pipe thats y he had to do this. Now pull the header just the way it is it should come out it took me 15 mins to figure it out. Basically just pull it from under the car grab it by the ass and just pull it dont turn it or anything you should have enough room to get it out. After you get it off put the new one on just the way you took the stock one out, it should not be hard after that bam youre done. Here is the after pix from under the car and above it
note i had not bolt the exhaust to the header yet so yeah. the fitness is perfect and i can feel a lot of torque and a lot more power wen im in the 7 rpm range, great mod here is the pix from above
any questions feel free to ask and yes i did left the heat shield off. why? i dont know you dont have to leave it off but i just left it off because i was 2 lazy to put it back on, but if you want 2 you can put it back on, it should fit perfect
yeah its gettin better hahahah to bad my friend got more hurt then i did thanks danny you asshole lets go to the track to see wat we get (beat that asshole enrique and his gay altima)
Great guide! I didn't even think to pull out the battery to get to some of the bolts when I put mine in. They were a little bit of a pain but after it's done you feel great.
What is the factory tourque for tightening the bolts? And I do not mean "as hard as you can", or "The tighter the better". There has to be a spec. Thanks.
it dosent say any were that you have to torque them, and i would say as hard as you can, you want the right torque call dc or ur local toyota dealer, it has to be tight enough so you wont get licks and get that ugly sound
I ordered the DC Sports Header yesterday for my 2000 GTS. I just can't wait to see if there is a noticeable gain in HP. Does anyone know anything about the Celica's Synchros?
wat about the celica synchros, if you have a 2000 there mite be a problem with them, make sure you get it check before the 60,000 k waranty expires, i had my hole trani replace because i had 3 bad synchros and everytime i shift it would make this nasty sound, get it check or spend 3 gs in a new trani
You can too use the DC header on the '03 after march GTS. Go to the nearest toyota dealer and get another exhaust gasket for your car. Take that to a muffler shop and most of them can make a plate that covers the EGR holes to go in between the header and the head on the engine. I just had mine done the other day and it worked great! I'll take some pics of it and post them soon.
Any way to install it without removing the exhaust O2 sensors? because when i did my exhaust my brother stripped one of them bad. luckily hes an engineer so he brought home a tool and die retapping kit and retapped it. then he used some kinda metal sealant on it. I have the headers and am looking to do the install this saturday and hopefully there is enough flex in the wires that i don't have to take it out.
I couldn't get the O2 sensors out with every tool my friends and I had. So I just cut the wires in different places so I knew where each one went back and crimped them all back together with connectors. Worked great for me.
u can do it with out taking the exhaust pipe out. but trust me its going to be way harder if you dont, you will have to follow the other guide if you dont want to remove the exhaust, i found this the best and easy way, i said use the universal wrench to get the o2 sensors out, use long pipes to give you more leabrage
no sorry i did not dyno my car, ended up selling my dc header because of the rest of the post made here, lost of hp or just 2 hp increase. sold all my shit and im waiting on tpr now, good luck ya. i heard that if you have power fc you can tone ur header to give you more power, and also if you change ur gasket wen you change the header that helps 2, but yeah good luck ya
Great install info I was planing on buying a DC-Sports header at the end of the week now I'm having second thoughts from the posts on this site, The TPR you were talking about where could I find it? and or what would you recomend instead of the DC?
as of right now there is no header out there that gives good gains, maybe the trd race header but thats 1g and really hard to find. so wait for tpr, the tpr header is not available yet, but will soon ones the intakes and exhaust start to ship.
maybe more than a month, right now the owner of the company is on a deep hole doe to the last shop. and he just have to make money before he starts on the header, so pretty much the intake, exhaust, and cams have to sell before we see the header
Yeah so I'm new here and I idc what any1 says about my 1zz auto gt..I lover with her hi mileage 175xxx. I've done a lot so far. Replaced stock cat and resonator. Replaced both o2. Front shocks and cut springs and downlinks. Rear shoes and cyclinders. Plugs coils injectors. Cam sensor. All fluids. Intake manifold gasket throttle body gasket iac gasket..and a new manifold with new tb iac. Valve cover gasket. Timing chain tensioner oring. I ran the car w/o cat..w/o muffler and stupid loud..I ran with cat res and no muffler and still loud...annoying loud..I recently ran into a shitload of problems with the lean code and misfire..I started throwing parts at her but then my gut kicked in before I decided on fuel pump regulator and cpu and whole harness..injectors replaced, seal replaced, pcv cleaned, pugs coils replaced..everything I replaced was due for tune up so I didn't feel to discouraged. Only thing this far that I threw at her was the camshaft sensor 50$ and a compression tester for 50$. I was worried cyclinder 1 n 2 were fried because of cheap obd scanner. After all research trial and error my gut said this shit feels like an 02 problem..got a better obd. Learned about fuel trims. To hell with giving up and taking it to a mechanic. I've had gopeds since I was 15yo and had the engine apart more times then I remember. These last few years watching YouTube of races and fixes and finally got my chance to stop daydreaming..I've had a 86 auto supra.87 targa turbo 5 spd. 88 5spd trans am. 93 sc300 auto. 98 camry 4 cyclinder..I never got involved with my car the way I used to daydream. I'm confident my knowledge and attitude and need to buy more tools only gonna increase with time...so my issues were my 02 sensors..the lean code the evap code then the misfire code along with poor mileage like 16 17 mpg...nope couldn't have that..if its gonna be slow gimme my 29 or 36 mpg..if its gonna be swallowing gas be quick and peppy..so I tested the throttle body, manifold, iac..sure no leak..plugs coils injectors seals..took the front upstream 02 and disconnected it and the car ran smooth as hell..I see a bunch of people say the downstream 02 doesn't do much but I beg to differ..they both have to do with emissions but I'd still run both of em after I delete my catalytic converter to 2 res pipes and a 4 inch muffler at the end for looks and some backpressure..I had cheap universal o2 maybe that was the problem...I'm still gonna change my fuel pump and regulator and strainer..175xxx..not gonna hurt her and give me peace of mind...I'm not gonna buy an exhaust tho. I just ported my header and me personally. I think I did an alright job for my 1st time..IMHO I lost some torque upfront. I also have a cheap ebay cold air intake that doesn't mount properly..pretty sure it's for the 2zz....I'm probably gonna get a ecu to counter the natural lean of our engine for fuel...after I fixed everything..my trims were in our celicas specs respectively..I might turbo her automatic or not..I miss 5 and 6 speeds but I'm not gonna swap another engine and tranny until I have to. I've got a little less cash now to burn but I work hard and I love my Toyota all day every day. Probaly can't beat anybody right now in a race.but I still look look better then 90% of 2020 cars..probaly better mpg and handling too...I've got pics of my header port job.im fairly new to celica hobby..I see I'm like a little late in here but o wells. I was doing the whole stalking and reading up on troubleshooting and upgrades and youtube and google..I wanted to let other celica owners know toyota is so worth it and easy to work on with a bunch handtools..dont be that parts replacer guy. Test test and test some more. Get to the root of the problem before you assume. If your reading this your already too late into spending time, but hopefully. Not money.
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