Liam Martin scored a memorable leaping effort as Penrith Panthers made a statement of intent by defeating potential Finals rivals Parramatta Eels 20-2 to rack up a 13th straight NRL win.

Table-topping Penrith led 6-2 at the end of a low-scoring first half at Panthers Stadium on Friday, with Josh Mansour diving over from Jarome Luai's pass at the siren.

But the Eels eventually caved under a barrage of attacks, having held up several efforts in the first half, with Martin athletically snaring the ball out of the air to touch down in the 56th minute.

Luai went over in the final stages as well to add gloss to the scoreline and provide the third-place Eels a reminder of the task they could potentially face come Finals time in October.

In Friday's other contest, Manly Sea Eagles triumphed 32-20 at rock-bottom Canterbury Bulldogs with Taniela Paseka, Curtis Sironen, Brad Parker, Jack Gosiewski, Morgan Harper and Martin Taupau all scoring in the six-try effort.

The win was soured slightly by late injuries to Cade Cust (ankle) and Addin Fonua-Blake (knee). The former is expected to miss the final two rounds, while the latter is doubtful to play against Gold Coast Titans next week.