these were on an s4 i had bought. 5,000 miles earlier the motor was removed and brought to the dealer. the heads were cleaned and valve seals were done.

as far as i know these are physically the same as the c5 allroad 4.2 chain drive, b6 s4 4.2 chain drive and c6 a6 4.2 chain drive. i pulled the motor because the block developed a bad score in cylinder 4. i ended up sourcing a different engine all together.

$1000 for the set of two heads