AMS Performance

Hello CLK55 owners,

Here is a dyno of the AMS CLK55 headers. Only difference between before & after are the headers (no software changes or etc). These gains are on stock ECU as well. These results are with stock primary cats and high flow secondary cats (both cats still in place, no deleted cats). In addition, Stock Resoantor & stock muffler are still in place as well. The other baseline modification is K&N filters. As you can see the stock manifolds are extremely restrictive and choke off the engines ability to really breathe well (especially at low rpms). The maximum gains were 23.3HP & 25TQ @ the rear wheels.



(Before & after done in identical weather conditions, at the same time of the day, same humidity, and same exact DD dyno for highest level of accuracy).


Thanks
~AMS~

MARTYMAR

What year is this CLK55? It can't be a 2004 model because those numbers are too low....I'd expect to see at least 300 HP for a 2004 CLK 55 AMG pushing 362 hp stock.

AMS Performance

This is loading Dyno Dynamics dyno, its different than a dyno jet (search for more info). Drivetrain losses are 22% on DD dynos. Also dynos were done in 80% humidity roughly so that also pushes the numbers down a bit (roughly 10-15HP compared to low humidity conditions).

Yes these gains are for CLK55 (or any naturally aspirated 5.5L AMG V8). They all dyno the same pretty much since they are essentially the same engines +/- a few HP/TQ.

GiZzO

which high flow secondary cats did you use and got any sound clips?

MARTYMAR

Thanks for clarifying that for me. I'm trying to decide whether or not to get a Veloce or Evosport/Powerchip ECU tune. Veloce states I could get up to 35 hp gains whereas Evosport claims 25 hp....they're priced the same at around $1400. Any thoughts?

AMS Performance

300 cell metal core catalytic converters. They provide excellent results in performance without making the car too loud (roughly 10-15% louder than stock). You can get a pair for only $180 shipped so its a great cost effective upgrade. They perform especially well with the headers.

AMS Performance

Without commenting on other companies products, I will say that $1400 is a substantial amount of money. With that said, our CLK55 AMG software is in the 400-500 range. Furthermore, if you like to retune your ECU in the convenience of your own driveway through your OBD2 port, the ECU flasher kit can be sent out to you directly for a refundable deposit which will then be refunded to you once the flash kit is returned. This makes it MUCH more convenient with zero down time, and at a much lower cost.

Our Stage 3, 3+ kit will maximize your power out put on your 55 AMG for a relatively low price.

You can opt for 6000 or 6400 rpm redline (6400 in manual mode), or level 1 or level 2 tuning. level 2 (6400) costs additional, but not much.

More dyno results & info coming soon .
~AMS~

Ghostrider

Are these the same ones that are shown on your website? If so, you may want to shoot me a PM.

MARTYMAR

Sounds like a really good deal but I'd rather take it to a shop to get the before and after dyno results too. I don't want to think I'm feeling more power when in fact it might not be there..lol....I want to know what the actually gains are. Sounds reasonable enough eh?

AMS Performance

Sure thing, its totally up to you. Our software dyno is coming out soon, if you want to wait.

However, for $1400 you can get headers AND high flow cats which will make much more than any software tune ever could, so keep that in mind.

MARTYMAR

Now I could definitely go for this! How much HP gains? 5-8 hp?

AMS Performance

On a CLK55 300-cell metal core cats made 10HP & 12TQ on the dyno (so roughly 12HP/15TQ at crank).

They make a very significant difference for a such a simple basic mod, and more importantly they really work well with headers, therefore if you plan to do headers down the road, then doing high flow 2nd cats is highly recommended. Primaries are fine and do not need to be changed or replaced and they almost never go bad.

Hope that helps.

AMG10

I'd like to ask you something. If all I change is the headers and keep rest stock W208 2001
how much would I lose?

AMS Performance

The only mod done prior to the headers was high flow 2nd cats, the rest of the entire system is bone stock so they results may be a few HP less than that but still relatively close. The headers are by far the most restrictive part of the OEM exhaust system, 2nd cats being next. Upgrading will significantly transform the way the car performs while still remaining street legal (well at least 49 state legal at a minimum) and providing a high quality exhaust sound.

Hope that helps.
~AMS~

ashutt

How about price the high flow 2nd cats (300-cell metal core)?

How about price for 300-cell metal core cats with the headers?

How about price for 300-cell metal core cats, headers & Pulleys?

Thanks.

AMS Performance

AMS does not manufacturer cats, they are merely recommended by us and work well with the short tube headers. You can purchase them on ebay for $180 shipped for a pair (email the seller for the discount price):

http://cgi.ebay.com/ebaymotors/High-...Q5fAccessories


Our stage 2 performance package (Headers & Pulley) costs $1699 ($100 savings off the standard MSRP). Since you already have the STUSA level 2 software upgrade your gains will be even stronger since you already have the software for it. By purchasing the Stage 2 PP you will essentially be a Stage 3+ setup.

Hope that helps. If you have any further questions feel free to PM/email.

Thanks,
~AMS~

denice25

great share.. thanks...

da_guitarist

Do you make headers for w208? Looks like w209 only....I understand the fitment is different due to a steering box or something.

MB_Forever

Any plans to make headers for the 63 engine.....

AMS Performance

Believe it or not, the 63 manifolds are actually really good for a log style manifold. Their primary openings are massive compared to the M113s so your only real option is going with long tube headers because I am skeptical any shorties will make that much more power over stock. This is one main reason why AMS never pursued the 6.3L headers because the headers are actually decent, there is more power to be had elsewhere. Just being honest...

~AMS~