$975 a pair. Anyone installed them ? Any dyno numbers ?

 

Very few people here have done headers. I can only think of 2 or 3 and they dont post much.

I should have some feedback soon.

I plan to purchase a set of VRP's and modify them right off the bat.

 

How do you plan on modifying the headers?

Or is that letting the cat out of the bag too soon.

 

From what I understand thus far on the SRT exhaust the factory exhaust piping itself is fine, but the exhaust mainfolds are restrictive.

I would suspect that using the LET headers, swapping the cats out for high-flow cats, removing the resonator and using a higher flow muffler would really open up the exhaust. A true dual exhaust would be nice too.

 

What I've read is that no header design for the SRTs has been proven to make additional power.

 

Or The VRP hearder - but maybe 240M3SRT has a trick up his sleeve.

 

That is acutally not a bad thing. Means that the stock manifolds work pretty well. No?

 

Well, for the envelope that's available for the headers, I would say that.

I always thought that when it came to FI, equal-length tuning, scavenging, exhaust velocity (and all that other stuff that's so important to N/A engines) was practically meaningless, and that it's more about maximizing airflow with big pipes and what not.

 

http://www.mbworld.org/forums/showpo...0&postcount=80

 

Headers as a general rule only give you more power at the top of the rpm range and tend to slow your off the line speed. If you want faster zero to 60 times stock headers will do you fine. If your looking for the most hp on dyno runs of best top end then headers would be a good choice.

 

VRP headers ordered.

We will know soon!

 

That's assuming you install a set of headers with primaries that are too large. A properly designed header will always out perform an OEM manifold no matter what you are going after, 0-60, top speed etc.

 

Good to know. I read and then forgot all about VRP. The gain seems pretty spectacular.

 

keep in mind the car that did its testing also had a custom cold air installed on the same test for the red line. so it has been determined that the red line is based more because of the cold air intake. there is also almost 30 mods done to that slk

 

That's what I vaguely remembered from before (that other mods were done at the same time), but I couldn't find that statement in a quick skim of the thread. Do you have a link to the post regarding this?

 

Are you refering to "redline" brand oil or the rev limiter? Im trying to understand what your saying.

And id like to know the mods too, i pmd the guy before purchasing my headers and he just said he had some cooling mods done.

 

All depends on the headers and the application. I used to be into the Mustang world (both the 1960's models and the later 5.0 models) and there was a variety of headers that could either develop low end torque or high end power (or both), depending on what you were trying to accomplish, how your engine was setup as well as the rest of the exhaust system. The Fox bodied 5.0 Mustangs actually came with tubular headers from the factory, but they were poorly made/mass produced headers (still better then your average cast iron exhaust manifold IMHO), and one could easily pick up a fair amount of power just by removing them, and cleaning up all their crappy welds, port matching the flanges, etc.

Then I bought a Viper (still have it, although it languishes in the garage mostly ) and put on a set of unequal length ceramic coated headers and they brought up both the low end and top end (not that the bottom end needed anything IMHO). I also pulled the highly restrictive factory cats, and installed a 3" exhaust. The improvement was amazing to say the least.

Unfortunately the advert for the LET headers say absolutely nothing other then "Click here to pay $975 for these SRT headers" so we really don't know what they do aside from soak up your wallet

Seriously it would be nice for them to post a little info on what they tried to achieve with their specific header design, some dyno data to back up their claim, etc.


Although I'm new to the SRT world, the exhaust seems to be tabo, as I don't see a lot of good data on exhaust upgrades. I've read that the Benz exhaust is fairly decent stock, but being that your trying to pump as much air through the SRT engine as possible, surely there are gains to be made by logical exhaust mods, unless Benz did such a great job of engineering it that any changes are minimal (which would be difficult to believe, but possible I suppose).

Just my 50 cents worth (accounting for inflation and all).

Brian

 

Some people are pulling their resonators and welding pipes in their place... Not sure of the hp gains, but they definitely seem to like it, at least for the sound.

 

That makes sense The only downfall I could see (if any HP gain is achieved) is the resonator may be there to prevent cabin drone, or it could just be there to appease the sound ***** (especially in other countries).

 

Heading to the dyno next Friday for before numbers..........LET Headers being installed afterwards and dyno to follow







2005 Silver srt6 Build #44181

LET Tune
Code 3 Pulley
Needswings CAI
Johnson Pump
TVT Thermo
Code 3 Spacers
LET Headers
Magnecor Wires
NGK Plugs

Eibach Pro Springs
Stern Wheels
Toyo Proxis 4 235/40-18 FR
285/30-19 RE