Quad tips on Ecoboost premium

[marcogerges]

Hello guys. I wanted to get quad tips to be installed on my premium ecoboost mustang. I have a really awesome muffler shop that did my custom exhaust, but I reused the stock tips to save money. Now I'm going after quad tips. I understand that this will require some cutting in the rear diffuser, which I don't mind. my question is, will THESE tips fit?
http://www.amazon.com/dp/B009R6ZSWI...TF8&colid=3KXO1H7AN0AEC&coliid=I201SHWDV5JZ0R

I'm not sure if I can cut enough of the rear diffuser to fit two dual tips with 3.5 inch outlet diameters. Would anyone be able to help me with this?

P.S. : Does anyone know how big are the GT350 tips? I was hoping that these tips would be almost the same size. Thanks!

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[marcogerges]

And while we're at it, these 4'ones look great too. Would they fit?

http://www.amazon.com/Flowmaster-15...sbs_263_6?ie=UTF8&refRID=0SFM48KM9FH593JQSB0K

 

[Impulsed7]

get the roush rear fascia. It only fits on premiums (which you have), and already is setup for quad tips.

 

[Juben]

Impulsed is right. Just grab the Roush lower valence. I think it's like $200 at Late Model Restoration.

 

[marcogerges]

I think that the roush valence is so ugly though. I'd rather save the 200 bucks + installation costs and just have the shop next to my house do a good clean cut. I'm just worried that the tips wouldn't fit at all.

And honestly if I'll be paying for a whole new valence, I'd so much rather wait for the GT350's. it looks a billion times better than Roush's

 

[2015-MUSTANG]

I replaced my ugly stock tips w 4". I measured the space and you could fit up to 5" diameter. Anything larger will require cutting.

 

[T-bone]

I replaced my ugly stock tips w 4". I measured the space and you could fit up to 5" diameter. Anything larger will require cutting.

Do you have a picture?

 

[2015-MUSTANG]

From my post a while back

 

[2015-MUSTANG]

What I installed

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