This is the intro to Resurrection, I have seen many tabs online and none of them are correct, 
they are close but not good enough for me. It's a cool riff and fun to play, so here it is...

  Chimaira
"Resurrection"

Tuning (Drop D) 1 Step Down
       CGCFAD

D >|---------------------------------|
A >|---------------------------------|
F >|---------------------------------|
C >|-7-----5-----3-----2-------------|
G >|-7-0-0-5-0-0-3-0-0-2-0-----------|
C >|-7-0-0-5-0-0-3-0-0-2-0-0-0-5-3-2-|
PM     - -   - -   - -   -                     

Riff 1A                                               
           Repeat Twice       (First Time)  (Second Time)

D >|----------------------------|-------|---------------------|
A >|----------------------------|-------|---------------------|
F >|----------------------------|-------|---------------------|
C >|-------4-----------3---2----|-------|---------------------|
G >|-5-4-0-4-----4-3-0-3---2----|-3-2-0-|---------------------|  
C >|-5-4-0-------4-3-0----------|-3-2-0-|-----0-0-0-0-0-0-----|
PM   - - -       - - -            - - -       - - - - - -


Riff 1B                               
                              (First Time)    (Second Time)

D >|----------------------------|-------|-------------------------|
A >|----------------------------|-------|-------------------------|
F >|----------------------------|-------|-------------------------|
C >|-------4-----------3---2----|-------|-------4-----------3---2-|
G >|-5-4-0-4-----4-3-0-3---2----|-3-2-0-|-5-4-0-4-----4-3-0-3---2-|
C >|-5-4-0-------4-3-0----------|-3-2-0-|-5-4-0-------4-3-0-------|
PM   - - -       - - -            - - -   - - -       - - -


Riff 1C


D >|---------------------------------|
A >|---------------------------------|
F >|---------------------------------|
C >|-------4---------3---2-----------|
G >|-5-4-0-4-0-4-3-0-3-0-2-0-0-3-2-0-|
C >|-5-4-0---0-4-3-0---0---0-0-3-2-0-|
PM   - - -   - - - -   -   - - - - -

Thats it for now, hope you enjoy!