Want to see what my MBH longtube headers make on a stock 55K?
#1
Former Vendor of MBWorld
Thread Starter
Want to see what my MBH longtube headers make on a stock 55K?
Then click here.
https://mbworld.org/forums/cls55-amg...ml#post3815999
https://mbworld.org/forums/cls55-amg...ml#post3815999
#5
#7
MBWorld Fanatic!
Very Nice! This is why I've always said that if I ever decide to mod my car I will address the exhaust 1st. You add hp without touching the engine. On average a pulley and tune would get you about 50hp &50ftlb's with added heat. I know that these headers are expensive but I believe/know that they are worth every penny. Hmmm 125mph traps with a stock engine and exhaust mods only????
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#9
Moderator Alumni
#10
PLATINUM SPONSOR
True” sequential firing order design
- 1.75” Primary
- 304 stainless steel
- 321 ½” stainless flanges
- TIG welded – with full back purge.
- Slip joint collectors
- Pre and post cat O2 sensor bungs
- Left and Right test pipes included
- Bottom: 3” header flange to test-pipe adaptors included
*Requires welding existing OE exhaust to header test-pipes and adaptors...simple!
NOTE: Dyno-Comp high flow 300 cell metallic cats available.
- 1.75” Primary
- 304 stainless steel
- 321 ½” stainless flanges
- TIG welded – with full back purge.
- Slip joint collectors
- Pre and post cat O2 sensor bungs
- Left and Right test pipes included
- Bottom: 3” header flange to test-pipe adaptors included
*Requires welding existing OE exhaust to header test-pipes and adaptors...simple!
NOTE: Dyno-Comp high flow 300 cell metallic cats available.
Very nice gains! I have one question; why do you prefer 1 3/4" primaries over maching the 55 S/C ports at 1 9/16 or 1 5/8 primary size? Larger primary tube diameters, than the exhaust port can decrease exhaust velocity exiting the heads.. Again, huge power gains but there might be more on the table still.
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E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
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![](https://mbworld.org/forums/signaturepics/sigpic87171_15.gif)
E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
facebook.com/ultimatepd