erniegram Posted December 9, 2007 Report Share Posted December 9, 2007 has anyone done headers for milly s Quote Link to comment Share on other sites More sharing options...
///BHRpowered Posted December 9, 2007 Report Share Posted December 9, 2007 I've looked into at the same same shop who did my exhaust, they wanted 350 and leave the car there for a day. I'm not sure what performance gains there would be though Quote Link to comment Share on other sites More sharing options...
erniegram Posted December 10, 2007 Author Report Share Posted December 10, 2007 what type exhaust do you have and do you think 350 is too much Quote Link to comment Share on other sites More sharing options...
Renboy Posted December 10, 2007 Report Share Posted December 10, 2007 The performance difference from headers on a milly would blow your jet chips performance out of the water. And $350 for a custom set of headers on a V6 is about $600 too cheap. Quote Link to comment Share on other sites More sharing options...
street3890 Posted December 10, 2007 Report Share Posted December 10, 2007 Has any1 ever done it before? Quote Link to comment Share on other sites More sharing options...
///BHRpowered Posted December 10, 2007 Report Share Posted December 10, 2007 cheap? your saying 950?? are you mad, especially whe na set of performance headers for say a jeep v8 only run 180 Quote Link to comment Share on other sites More sharing options...
Jdubs99 Posted December 10, 2007 Report Share Posted December 10, 2007 Eh, 1250-1600 is more like it my estimation for SS with a thermal coating on the interior walls if someone else is doing the fabrication. Quote Link to comment Share on other sites More sharing options...
Graham Posted December 10, 2007 Report Share Posted December 10, 2007 I don't know if the KJ engine has the same manifold as the KL, but has anyone tried these: http://www.nahux.com/NPOWER/product.php?part_no=H-KLZE I've also found the same item for AU$449 plus shipping on ebay.com.au - could actually be the same seller as that website, I don't know but they're both in Australia. So for $500 AU = US$450 - you should be able to pick these up easily. From my experience, a complete exhaust system on a 4 cylinder is AU$800 to 1100 (US700-1000) but that's with pre-made headers. Custom headers would add a good bit more and then even more on a V engine. oops, just found this US site listing the same headers for US$295: http://www.ssautochrome.com/level.itml/icOid/1429 btw, "My experience" prices mentioned included fitting. Quote Link to comment Share on other sites More sharing options...
///BHRpowered Posted December 10, 2007 Report Share Posted December 10, 2007 You could probably modify those to work on the L, not sure about the S though, I kind of doubt it. I just got a price on the labor to basically take the old ones off and make hihg-flow copies, didn't ask about install or any special coatings Quote Link to comment Share on other sites More sharing options...
Renboy Posted December 10, 2007 Report Share Posted December 10, 2007 Graham, those are the headers that I have on my mx6. For the price, they can't be beat. They're stainless, and the welds are fantastic. The only problem with them is the gaskets that come with them are shit, you're better off getting new stock gaskets. And yes, those would bolt right up to a KJ. The only problem (on both milly models) is the crossmember clearance. You would have to modify the collector on those so it becomes one pipe sooner, and then has the bend to it that will clear the crossmember. Add another $250 to the price of those and you're set. Quote Link to comment Share on other sites More sharing options...
///BHRpowered Posted December 10, 2007 Report Share Posted December 10, 2007 so would you say its worth modifying those to fit on the S? estimates on performance? Quote Link to comment Share on other sites More sharing options...
Renboy Posted December 10, 2007 Report Share Posted December 10, 2007 For the 'S' the difference would be more substantial than that of the 'L'. Reason is that the 'L' doesn't have expensive assed restrictive precats. Not to mention the 'S' has unequal length tubes stock...cheap. I'd say a minimum 15hp increase. A small detail that will have to be addressed will be the o2 sensors. The primaries already have bungs in them for the upstream sensors, the downstream will have to be relocated after the main cat to avoid a CEL. If I had a milly, they would already be there. Not only for performance gains, but the cost of headers is less than the cost of replacing the precats (which suck balls anyway). Quote Link to comment Share on other sites More sharing options...
///BHRpowered Posted December 11, 2007 Report Share Posted December 11, 2007 I would like to remove the precats, but there is concern on the part of emissions. Headers were on my list if it could be done though Quote Link to comment Share on other sites More sharing options...
Renboy Posted December 11, 2007 Report Share Posted December 11, 2007 Everything can be made to pass. And if you relocate the o2 sensors, not only will they be more accessible, but they *should* give better readings since the main cat can be swapped to a larger freeflowing cat. Quote Link to comment Share on other sites More sharing options...
///BHRpowered Posted December 11, 2007 Report Share Posted December 11, 2007 I will have to review this indepth Quote Link to comment Share on other sites More sharing options...
mts Posted December 11, 2007 Report Share Posted December 11, 2007 NDD Ren, I am really feeling a serious undertaking comin on... if I get another car in the spring, we might just have to do the exhaust and maybe the cams.... Quote Link to comment Share on other sites More sharing options...
///BHRpowered Posted December 11, 2007 Report Share Posted December 11, 2007 hmm. I would really like to do this if possible, especially if its just a 295 header and then say 100-150?? for modifying it. Would the outlet still be 2.5 before the precats? I was thinking the following would be my complete exhaust headers high flow cat remus exhaust 2.5" piping the whole way I assume its 295 for both sides. I don't want to, nor do I have the funds to be the guniea pig at this time, HOWEVER, if someone eles (mts?) gets this done with success I will be the first person in line, all I would probably need is the specs of how to change the headers for the crossbeam and I guess the o2 sensors? any idea on how much it would cost to mod the headers and relocate the o2 sensors...and hope it passes emissions. Quote Link to comment Share on other sites More sharing options...
Renboy Posted December 11, 2007 Report Share Posted December 11, 2007 MTS, if you have mandrel bent tubes, I have two welders. Thinking about it today, and it really wouldn't be hard to do, very easy actually. Quote Link to comment Share on other sites More sharing options...
///BHRpowered Posted December 12, 2007 Report Share Posted December 12, 2007 ren...are you saying you could mod the headers linked to to work (cross member, bung relocation etc) If its possible to create a set of headers my exhaust shop could more or less bolt on to my custom exhaust (2.5) remove the precats and go with only high flow cat, resonator, and muffler well then hot damn. name your price for parts, labor, and shipping. I'd still like the big brake kit, but I feel this would be a bigger leap forward in millenia performance. Quote Link to comment Share on other sites More sharing options...
Frankzao Posted December 12, 2007 Report Share Posted December 12, 2007 NDD now I am intrigued.... Quote Link to comment Share on other sites More sharing options...
///BHRpowered Posted December 12, 2007 Report Share Posted December 12, 2007 this is very promising...I just can't imagine those headers actually fitting. I mean there has to be clearance issues with all the other stuff crammed in the 2.3 engine bay Quote Link to comment Share on other sites More sharing options...
Renboy Posted December 12, 2007 Report Share Posted December 12, 2007 You guys don't realize...I don't have a millenia. I could make them, and they would fit, but I don't have a car to test them on unless MTS gave me his car for a weekend and I made a batch of them. Even that, I'd first have to get the mx6 ones here (I'm not taking mine off my car). The only two restrictions I can think of are the egr tube, and the headers rubbing against the fans. Given the width of the precats I don't think they'll rub the fans, and in the odd chance they did one of the fans would have to be replaced with slim fans ($60). The egr tube I already have a work around for. Incidentally, I have to do this on my car since my original design proved flawed. Quote Link to comment Share on other sites More sharing options...
///BHRpowered Posted December 12, 2007 Report Share Posted December 12, 2007 Ren, ill make you a deal, if you can truely do this, getting everything to be bolt on, including the o2 etc, and then it'll bolt to a 2.5 exhaust I will pay to send a set of these headers to you, so long as mts can supply a car, or perhaps he'll also have a set. Make one for mts for testing purposes, then have an extra set ot make copies of. But you fail you pick up half the cost of hte headers (150) Where the hell are the precats anyway. Quote Link to comment Share on other sites More sharing options...
Renboy Posted December 12, 2007 Report Share Posted December 12, 2007 That's kind of a shit deal. You send me headers to work on, and then expect me to pay for half their cost if the work can't be done. I'm sorry, this benefits me how? Precats are bolted to the head. Quote Link to comment Share on other sites More sharing options...
mts Posted December 12, 2007 Report Share Posted December 12, 2007 You guys don't realize...I don't have a millenia. I could make them, and they would fit, but I don't have a car to test them on unless MTS gave me his car for a weekend and I made a batch of them. Even that, I'd first have to get the mx6 ones here (I'm not taking mine off my car). The only two restrictions I can think of are the egr tube, and the headers rubbing against the fans. Given the width of the precats I don't think they'll rub the fans, and in the odd chance they did one of the fans would have to be replaced with slim fans ($60). The egr tube I already have a work around for. Incidentally, I have to do this on my car since my original design proved flawed. Well I might order the MX-6 ones in the new year, and then you can have my car for a week or so... when away on business, just have to drive me to Pearson. Sound like a business proposal? We can make some coin too... Quote Link to comment Share on other sites More sharing options...
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