I would think (or is it hope) the shorty SuperSprint headers (or any good headers) would make a performance difference on both the SRT and N/A XF.

They are a bit pricey but with some imaginative "make-it-so" financing ...

$2,785 (SS Shorty Headers)
$ 970 (ASP Pulley Kit) (14% SC Boost)
$ 600 (Custom ECU Tune)
$4,355 Total Performance Upgrade Cost (70-85 HP gain??)

That's only $1,055 more then a Renntech pulley upgrade and $1,460 more then the EVO pulley kit alone. That prices the headers within range.

I not sure you can make long headers for the SRT without major modifications, I just don't see the room, plus you would have to relocate the upper CATS etc.. At that point you may as well replace your entire exhaust system with dual 2-3/4 pipes and dual mufflers. (Then if the smog-check guy only puts the probe in one pipe, sniffing three lugs - I might just pass)...

It appears like where the upper O2 sensors are located is a major bottle neck for the exhaust. The SuperSprinters bolt on beyond this bottle neck at the flange, and (if) the headers also eliminate the exhaust port "shroud" issue, then I would expect some decent gains.

I like the plug and play idea, I can wrench in all the above myself with only the O2 sensor relocate requiring shop time and I can have that done before I start removing OEM parts.

Jeeze - I'm really talking myself into this...

 

Yes I Agree with everything you said up there, but also in that performance package a well maid intake system would be a good add... maybe... needswings intake system and also... The leading edge technologies pulley would probably be the better way to go as it makes more boost... but not much more... not enough to cause a slip...

And finally improve on the intercooler and we will have a pretty well performing vehicle.. no less than the c6 vettes at least...

Once I do the rims, tires, brake lines, dust-free pads, and basic suspension work, ($5,000+) i will do start doing the basic engine stuff and this surely seams to be the way to go...

O and **** the smog check guy...

 

Gotta move out of state to skip the smog check guy - and that's not going to happen.

I plan on adding a SLK55 V8 AMG intake and Y-pipe, Iridium spark plugs, Dual A/F gauge, Boost gauge & Oil pressure gauge prior to the performance mods mentioned. Still debating the need for an Oil temp gauge; would be nice but just no room unless I decide to pillar mount one of the gauges.

Leading Edge does not have my trust for the OD Pulley. ASP communicates with me so they get my business.

I'm lucky because I like the stock SRT rims & PS2 's. The resonator is removed, the car is lowered, my brake upgrade is done, granted minor upgrades but I'm happy with the OEM setup. I don't plan on tracking the car so I don't see the need to change everything.

I'm getting close to performance mods!! - Would like to save some $$ on a set of decent headers but can't find a better deal for bolt-on's.

Intercooler upgrade is still down the road - I need to do more research but have a few ideas.

I figure at $25K for the new SRT6 plus $6K - $7K for performance mods still gets me a killer ride for around $32K.

 

Brian/Sidez,

You guys have it all figured out!

So, one of you hurry up and get it all installed so I can see how it all goes.

Seriously, I can't afford it right now, but will eventually.

SQ

 

Finally got an email back from SuperSprint - Only 8 shorty headers were ever made - they don't know if they would fit the SRT-6.

So I asked if they would give me a full refund if I took the chance and purchased the headers and they did not fit.

SuperSprint's one line reply - "These headers are not in stock and no longer in production"

End of story!

 

anychance they can tell you what the SP headers dynoed at?

 

I was just checking the Kleemann USA website, and came across this....

KLEEMANN Tubular Headers


More power - Better sound

The KLEEMANN tubular exhaust headers remove exhaust backpressure allowing the engine to breathe freely and thereby produce more power.

Supercharged as well as normally aspirated engines will benefit from the use of KLEEMANN stainless steel headers. A normally aspirated engine will typically gain 7 to 10 percent in horsepower and torque, while a supercharged engine will gain as much as 15 percent in horsepower and torque.

KLEEMANN headers are made of high quality stainless steel and feature mandrel bends, precision water-jet cut flanges, larger primary pipe diameters, and larger collectors and down-pipes. KLEEMANN headers integrate with the stock engine management flawlessly with no need for further modification.

Available for all Mercedes-Benz V6 and V8 engines
The KLEEMANN Tubular Exhaust Headers fit all V6 and V8 engines of 1998 and newer. Whether you own a six or an eight cylinder car with the M112/M113 - or the M272/M273-generation V8 engine KLEEMANN has a set of high flow exhaust headers that will add 20-30 Hp to your NA engine and up to 40-60 Hp to your forced induction V6/V8

Combined with a KLEEMANN exhaust system the sound is just phenomenal - something you have to experience.


I must say, if Kleemann headers make THIS much power for NA M112 motors, and if it does indeed fit our Crosseys, then this is DEFINITELY the way to go in regards to headers.... just my 0.02...

Any thoughts?

 

Seems I always end up being the thread killer on any and all websites these days... Any info. on the Kleemann headers anyone? ANYONE?

 

dealing with those guys is the headache but if anyone wants to go through with it as there is little information.. but my guess is that it is the samething as the supersprint...

 

it would be pointless to buy any eurpean speed parts right now, unless you like paying 3 times the real vaue, I hope the Euro will come down in price soon.

 

Maybe needswings can make this possible..

 

Don't count on it.

 

I talked to a fabricator that I work with (he builds Nextel Cup headers). He feels as if $600-$1000 would be a more appropriate price from what he saw of the Super Sprint headers. Now I just need to convince him to build me a set.

 

Once you build the proto and have the jig cut, the price of material is a mere $120 (retail) The problem is do you want long tube, or short tube and do they need to pass smog with the secondary 02 bungs attached...

 

Shorties - and I'll relocate the O2 sensors just below the flange.

 

Sorry if you thought this was an offer to build some for you... I don't have the time, nor the interest to get into the aftermarket performance parts business... I have my hands full with my new engine...

But as I stated in MANY threads... "burns stainless" and have your local race shop use the specs and build them for you...

 

I was just dreamin'

 

Trust me, you wouldn't want me welding anything of importance...

 

who would be interested in shorty headers? How much do you feel is fair for non coated stainless, we might be on to something!

 

I just did some price comparrisons. I checked Sanderson since they make headers for very low volume custom applications such as shorty headers for a small block chevy in a '37 Ford. On average their V8 shorties are $285 for plain uncoated steal and for an additional $150 you can have them Ceramic coated. Total price $435

I would prefer ceramic coated plain steal over stainless because the stainless always shows some rust especially around the Welds and Ceramic coated headers hold the heat in much better and reduce underhood temps.

Another advantage to plain steel is that if you are welding from pre-made curved pieces you have a larger selection of pre-bent curves in steel than stainless.