JCR-Porsche

Hey all,

More new products released this time suitable for all 991 GT3 RS models installed with OPF and 991 Speedster

This selection of product allows owners of 991.2 GT3 RS and 911 Speedster installed with OPF to achieve a more aggressive sound and appearance but without swapping their factory exhaust system

All products are in stock and available to order now via the JCR website

JC

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JCR OPF VALVE DELETE KIT

First up, the JCR OPF Valve Delete kit provides a safe way to disable the factory exhaust valves installed in the OPF exhaust system and keep valves locked safely in the open position. The kit also includes a 3D printed valve delete box which has been supplied with our OPF Race Pipes allows the factory exhaust valve to operate as normal whilst safely positioned to keep the car running perfectly and avoid any chance of engine lights






Key Features - Valve Delete Kit

• Deletes Factory Valve Function
• 100% Reversible
• No CEL

Pricing & Availability - Valve Delete Kit

• £495.00 GBP
• Available Now

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JCR OPF TITANIUM TIPS

Secondly we’re also offering direct replacement upgraded Titanium Tips for the factory OPF rear silencer in either Megaphone or Straight design which removes the factory restriction and sound suppressor along with creating a more aggressive appearance to the rear end

JCR TITANIUM OPF TIPS - MEGAPHONE








JCR TITANIUM OPF TIPS - STRAIGHT









Key Features - Titanium Tips

• Deletes OEM Tip Sound Suppressor Restriction
• 100% Reversible
• Improved Looks

Pricing & Availability - Titanium Tips

• £795.00 GBP
• Available Now

Carcam

They look great- can you really hear a difference just changing the tips?

uhn2000

I think he is referring to this.. https://www.jcr-developments.com/por...lved-race-pipe

Anyhow I have the GMG on right now and its very loud with no valve option. I might try yours..

JCR-Porsche

Yes, subtle but noticeable. If you check out the stock tips they have a pretty substantial drop in inside diameter and the profile is designed to reflect and reduce the volume.

In combination with the valve delete kit also it makes for a good sound improvement without changing out the stock exhaust

Who is referring? Sorry for the confusion, don’t know if a post may have been deleted since

Yes we have three options for the OPF cars and the Valved system you have linked above does allow the car to retain the split personality many enjoy. Albeit along with a huge weight reduction, increase in power and that signature JCR sound

JC

DaveGordon

Does the valve delete mostly change low rev/throttle sound? Thought it was established that the valves are open most of the time anyway?

JCR-Porsche

Valves open over quite a small throttle opening over set RPM ranges but snap closed the moment that the throttle is lifted and on downshifts and partial throttle or closing throttle applications. They're constantly varying to some degree, of course the valve delete will not make the car louder at WOT but this just adds more sound more of the time.

The tips do add volume as they remove the factory restriction

JC

Finlander

Whats OPF mean?

DaveGordon

Stands for Otto Particulate Filter.

ONEOFEW

JCR, will you post sound clips part throttle and decelerating?