RSSmike

RSS 997.1 Top Seller Lightweight Underdrive Crank Pulley # 601 In Stock

Arguably the Best Bang for the Buck upgrade for you Porsche!

Unleash extra power, improve cooling efficiency, avoid boiling the power steering fluid and achieve better throttle response with the # 601 Crankshaft Underdrive Pulley.

The RSS Lightweight High Strength Underdrive Pulley is made from 6061-T6 aluminum. Offers improved HP & TQ by reducing drag from the power steering pump, A/C, water pump and alternator which is a must for any street or track enthusiast Installation wrench included. Fits all Porsche models EXCEPT 2.9L 3.8L, DFI and Turbo/GT3. We recommend using the appropriate length belt RSS # 6PK which can be purchased separately.

https://roadsportsupply.com/601-perf...6-997-3-6l-na/



https://roadsportsupply.com/6pk-cont...-kits-601-608/

RSSmike

RSS 997.1 Top Seller - Performance Underdrive Crank Pulley # 601 In Stock

Arguably the Best Bang for the Buck upgrade for you Porsche!

Unleash extra power, improve cooling efficiency, avoid boiling the power steering fluid and achieve better throttle response with the # 601 Crankshaft Underdrive Pulley.

The RSS Lightweight High Strength Underdrive Pulley is made from 6061-T6 aluminum. Offers improved HP & TQ by reducing drag from the power steering pump, A/C, water pump and alternator which is a must for any street or track enthusiast Installation wrench included. Fits all Porsche models EXCEPT 2.9L 3.8L, DFI and Turbo/GT3. We recommend using the appropriate length belt RSS # 6PK which can be purchased separately.

https://roadsportsupply.com/601-perf...6-997-3-6l-na/



https://roadsportsupply.com/6pk-cont...-kits-601-608/

Vince Vincent

I have a 2006 911 S (3.8L), can you recommend/provide the correct pulley and link it for review/purchase?! THank you!

RSSmike

For the 997.1 (3.8L) we recommend the 608 Damped Pulley. We are currently sold out but are taking pre-orders. See link below for details..
https://roadsportsupply.com/608-harm...6-987-996-997/

Michaelc

While this underdrive pully reduces drag from the A/C, power steering and alternator what impact does it have on the effectiveness of those accessories, particularly the A/C?

Michaelc

Anyone on this?

jchapura

Power steering - no difference.
Alternator - seemingly no difference. After weeks with the 608 in place and being daily driven - no issues with starting (or low voltage-caused issues).
A/C - might be too early to tell - haven't yet reached the heat of the summer. So far, so good, though.
Water pump - might be too early to tell - haven't reached the heat of the summer. So far, so good, though.

If you're used to "listening for everything" from your engine you will probably notice a difference in tone or frequency because the driven items are running slower and presumably generating their "noise" differently. I definitely noticed it on the first few drives.

Michaelc

Can anyone advise when this will be available for the 997.1S with the 3.8L? It says pre-order on the website, how long until the pulley is available for the 3.8L?