Paramount Performance Exhaust vs Mod-stock

Cliffedge

Cliffedge

New member
Had my My21 V8 R P575 for 6 months now and really enjoying it, but having come from TVR’s over the last 15 years I’m finding it too quite even with fuse 15 removed. It’s great when driving hard but too quiet when pottering around town.

I’m interested in the Paramount Performance upgrade from cat back although it’s a little pricey, and I know a lot of people have good things to say about the Mod-Stock back box replacement which is a fraction of the cost.

I just wondered what others have done or recommend?
 
Mod-stock is the way to go. Make sure they do the full 100% mod on the rear box as it very orchestral.
 
I've had the partial mod done on my 2017 R (doesn't have a particulate filter like newer cars) mine was already loud, it has raised it a notch but kept the same sound. I did have the VAP back box for a bit and it completely changed the sound, didn't sound as refined to me as the original, hence putting original back box back on and getting mod stock to do their great work.

For clarity, partial / full mod just refers to the amount of sound insulation they remove from the back box, they didn't remove so much from mine.

I think you'll make a big difference in volume going full mod, but keep the original tone!
 
Mod-Stock sounds perfect for me, I want to keep the same tone and deepness (hate a raspy sound), just want more volume.

I'd love to more detail on what they do. Is there any internal re-routing of the pipework (had that done on my Supra & S2000) or do they just open it up and remove some of the sound deadening material as I could have that done locally (I'm 580 miles each way from Modstock)
 
Details are on the Modstock website, £480 by the looks of it. I believe they go to locations around the country when they get enough customers lined up.

https://mod-stock.co.uk/collections/v8-f-type
 
Mod-stock remove the back box cut and lift the top lid. Remove the packing and replace the perforated tubes and weld with sealed tubes and refit and reweld the lid.
 
JAGBOB said:
Mod-stock remove the back box cut and lift the top lid. Remove the packing and replace the perforated tubes and weld with sealed tubes and refit and reweld the lid.
Click to expand...

Thanks for that. Same as I had done with my Supra then.
 
Ah that’s interesting, with me having the partial mod I only had some of the sound deadening removed. What does changing out the perforated tubes do? Mine is bloody loud but stock tone, love it!
 
Jimmyrn85 said:
Ah that’s interesting, with me having the partial mod I only had some of the sound deadening removed. What does changing out the perforated tubes do? Mine is bloody loud but stock tone, love it!
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With replacing the perforated tubes or getting a tube the right length and cutting long ways and welding around the original perforated tube, stops the exhaust gasses escaping and quietened in the silencer box with the fibre glass which is removed as not needed. So the gas flow is straight out the box instead of the been sent around the internal silencer. If you have a look on YouTube as it may give you a better idea.
 
I'd just ask the guy at Modstock what they do.

He was pretty responsive via watsapp.

As other have said, they build up a list of customers then go to an area when the list is long enough. Either that or you can book in and go to their place in Epsom and they do it while you wait in their cinema room.
 
I got Mod Stock to do the mod on my 575.

I came from a very loud M2 with a sports CAT and sports exhaust and I have also had a straight through Chimaera.

IMO the sound is just right. It pops and bangs much more than standard but it doesnt drone when crusing. Its not as loud as the pre facelift cars but for £480 its a bargain IMO.
 
If anyone can tell me how to post a video (I’ve searched but to no avail), I had a tune done at Viezu this morning. They did before and after rolling road runs. The before run is a completely stock V6S other than a ModStock back box conversion. It will give a reasonable idea of what a pre-facelift V6S sounds like with the ModStock conversion.
 
Had the partial mod done last year, not enough for me even though I’ve got one of the older louder cars, so going to ask them what’s next…………………..this is what happens when you’ve spent 9 years in a de-catted Tamora

The guys that came to the house were very coy about what they were actually doing, good lads though as they freed up my stuck valves whilst under the car
 
Open that box up and go full mod then Tom! You sent me your videos on facebook, think it sounds lovely, but if you want more volume there is always that VAP valved back box... For me personally it sounded dreadful just driving around slowly with valves open, silent with valves shut, but epic when you were giving it some. Took it off after a week!
 
Thanks, yes it does sound good, I can’t bring myself to pay for a new exhaust (yet), my daft M2 driving Nephew advises the decat option 🤔…………….has anybody de-catted one of these?
 
Anyone here with a P450, with the viezu 200 cell cats and the stock exhaust?That is what I am planning on doing was hoping on maybe getting a review from anyone who has done this.
Thank you
 
Spitfire 77 said:
Anyone here with a P450, with the viezu 200 cell cats and the stock exhaust?That is what I am planning on doing was hoping on maybe getting a review from anyone who has done this.
Thank you
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I haven't done this with my F-Type (on stock P450 system), however based on experiences with other cars it will make it sounds raspier, so depends what sort of sound you're looking for. For me, I would just want more volume, but maintain that deep V8 noise.
 
scz4 said:
Spitfire 77 said:
Anyone here with a P450, with the viezu 200 cell cats and the stock exhaust?That is what I am planning on doing was hoping on maybe getting a review from anyone who has done this.
Thank you
Click to expand...

I haven't done this with my F-Type (on stock P450 system), however based on experiences with other cars it will make it sounds raspier, so depends what sort of sound you're looking for. For me, I would just want more volume, but maintain that deep V8 noise.
Click to expand...

I want a deep v8 tone but also more volume , for the volume bit I will need to get rid of the particulate filters, I don’t want to change the tone at all , any suggestions?
 
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