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They say you're suppose to get a few added HP but not enough to be able to tell the difference IMO, unless you got WOT in which I haven't yet! I did this solely to get that extra 40-50% added growl and didn't want to sell my MAK race pipes considering when you're buying stuff from the US to...

The new Thunderbolt 99659HM HFC's have now settled and sound is approx. 50% louder than my original Borla S-Type with X pipe setup. The great thing is as mentioned above is that in lower RPM's it's quiet as my original setup, no drone and you go WOT it just sounds amazing! Now my son is like...

I have the Ceramic Pro 9H with over 5 solid coats and it adheres perfectly fine!

Yeah it seems like these guys here are trying to convince me their product is worthy or something! Most of these so call it ceramic coatings aren't even Ceramic Pro 9H hardness and this is why it's so easier to apply due to the lack of minimal hardness! The viscosity of that $185 30ml bottle I...

In Canada YES and these HFC's are good in the US except for NY & California due to stiffer EPA regulations, pretty sure anything 300CEL or lower isn't legal in the US. Got them from ZZ Performance on Ebay and shipping to Canada was 3 business days from the time it left the US to Canada which is...

Original Setup: Borla S-Type Axel back with SR X pipe. Added the MAK race pipes and it was wayyyyyyyyy too loud for my taste so today I went back to my welder to have the 3" I/O Thunderbolt 99659HM 400CEL which are identical to the Magnaflow 99659HM but at half of the price! The sound notes...

Was gonna get into the "Ceramic Coating" business but it's not as great as what people seem to think it's all about! I've used $185 Ceramic 9H Pro and cheaper crap. The majority of what most people are buying from these online and detailing shops contain too much carrier fluid and not enough of...

They look awesome and was always thinking about getting multi spoke designs like yours but I clean my wheels too much and cleaning those wouldn't be any fun but they definitely ROCK!

Sorry to have reawaken this thread and some of the info was very helpful! I read in another forum where the CELL count for the S550's was around 700! I had a Borla S-Type with X pipe setup, added the MAK race pipes drove out of the shop with a huge smile on my face "while being in the country...

Sunset cascading onto the side of the car...

Again, funny how you've directed me to RV6 performance as these were the guys I had bought all of my exhaust components from when I had my Accord 5+ years ago! :-) Cheers

Didn't think it would be that bad but after adding the MAK race pipes the fumes was intolerable. I'll most likely stick with my current setup and already have them for sale on Kijiji!

If I took that route I'm not sure if I can deal with the exhaust fumes, it's horrendous! Had the MAK setup for one day and wasn't pleasant driving around catless as a daily driver but to get that mid louder tone your option is best and I still have my stock resonator too, its just the fumes!

Ok thanks and if that's the case I'll just sell the MAK Race Pipes!

You mean 35% decrease in volume if I'm adding these cats to my catless race pipes right?

Yes Adrian just put them out not too long ago because they were cracking down on companies selling race pipes but as a Canadian those MAK with GESI high flow cats are $1000CAD! Stupid thing is if I buy 2 X 50030 HO GESI cats from GESI to add to my MAK race pipes, pay the welder it'll be about...

No it doesn't have to be CARB approved as I do not live in the US and in Canada but do want a 400CPSI but seems like GESI has only 300CPSI. I know the lower the CPSI the louder the exhaust will be so on the fence with 300CEL because no one is coming up and saying how much percentage the overall...

I've looked into the HFC's and the #1 HFC seems to be the HO 500WHP per/cat or UHO 850WHp per/cat for boosted applications that are from G-Sport by GESI but they are $1000CAD just for 2 HFC! Flowmaster has gotten alot of bad rep on their HFC's "inner cores rattling" and haven't heard anything...

I don't have an EB and it's a GT and already have the MAK race pipes as mentioned!

https://www.cjponyparts.com/mishimoto-downpipe-high-flow-catted-stainless-steel-3-mustang-ecoboost-2015-2021/p/DPMS2/