Perrin HFC or Random Tech HFC for IX?
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From: Tri-Cities, WA // Portland, OR
The flanges on the Random Tech are loose on the tubing. The tubing is bent over at the ends to create a sealing surface and keep the flanges from sliding off. I've got the 2.5" cat on my car with stock DP and cat-back. The flange setup seemed hokey, but its been working perfectly for over a year now.
For my 3" setup I'm getting ready to install, I was going to go with the Perrin just because its less expensive, looks well-made, already has one bung, and has the same metal substrate core as the Random Tech. Instead of the Perrin, I ended up buying one of the 100 cps bare metal substrate cats and having flanges and bungs welded up. The first go-round on the flanges and bungs turned out to be a disaster. The well-known company will who did the work will go unnamed for now. I've got a local guy redoing it for me this weekend. Anyhow, the guy selling the 100 cps bare cats is working out a contract to have the bare cats turned into a bolt-on. If you really want the highest flowing HFC, wait a bit. Otherwise, the Perrin is a very nice unit regardless of the great price.
For my 3" setup I'm getting ready to install, I was going to go with the Perrin just because its less expensive, looks well-made, already has one bung, and has the same metal substrate core as the Random Tech. Instead of the Perrin, I ended up buying one of the 100 cps bare metal substrate cats and having flanges and bungs welded up. The first go-round on the flanges and bungs turned out to be a disaster. The well-known company will who did the work will go unnamed for now. I've got a local guy redoing it for me this weekend. Anyhow, the guy selling the 100 cps bare cats is working out a contract to have the bare cats turned into a bolt-on. If you really want the highest flowing HFC, wait a bit. Otherwise, the Perrin is a very nice unit regardless of the great price.
Random Tech has 300 and 200 cell units available, IIRC. Don't know what the Perrin is, but my guess would be 300. No company I know of sells the 100 cell cats. There are other options than said companies, though 
I know where Random Tech gets their cores from...they don't make their own metal cats
Ceramic cats can't even compare to the flow rates of the metal cats.
I know where Random Tech gets their cores from...they don't make their own metal cats
Ceramic cats can't even compare to the flow rates of the metal cats.
Last edited by Erik@MIL.SPEC; Jan 19, 2008 at 07:34 PM.
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EvoM Community Team
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From: Aurora, IL
Random Tech has 300 and 200 cell units available, IIRC. Don't know what the Perrin is, but my guess would be 300. No company I know of sells the 100 cell cats. There are other options than said companies, though
I know where Random Tech gets their cores from...they don't make their own metal cats
Ceramic cats can't even compare to the flow rates of the metal cats.
I know where Random Tech gets their cores from...they don't make their own metal cats
Ceramic cats can't even compare to the flow rates of the metal cats.
So are you actually going to have those 100cels fabbed up into actual bolt ons?
I just ordered from perrin performance. I didn't realize you could order directly from that site, but I guess I should have looked at the banner on my right
I'll post pics and fitment when it arrives.
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I thought it was full 3" but there was speculation that it was as small as 2.5" at the two resonators. I couldn't decide between the RM01A and the Legalis R, but it seems like the legalis is quieter overall, but louder at idle/cruising speed (according to what fujitsubo info I can find/read) and the RM01A is lighter.
Hopefully I don't have to have AMS cut and weld a flange on the RM01A, but I guess we'll see. No idea why Fujitsubo wouldn't just fab that as 3", but I remember my Greddy evo II for my DSM had a second small 3-4" piece that was the neck-down. What a waste of metal
Ok, Rant time:
I guess I will not be ordering the Perrin unit from lancershop. I was interested in purchasing a few parts from this company, but just put in my order for the HFC today. After ordering this morning I get a call from an unkown number about 5 hours later looking for "Karen". I say they "must have the wrong number, have a good one" and the lady stops me asking if I'm Jon (I am). She says thats strange and confirms my address and says everything is ok.
Minutes later I get another call leaving a message. I go through lancershop's crazy callback system (that takes forever) because they are asking for a copy of my license, credit card, and some other information faxed over. If it was even possible for me to send a copy of the credit card (I used a virtual account number as I always do with online transactions to prevent identity theft) or a copy of my license (I live in an apartment, I've lived in 5 different places over the last 6 years and I'll probably be moving again in a couple of months... my address is correct with SOS but not on the license) let alone I don't know how I would even stuff those into a feed fax machine if I had access to one.....I wouldn't do it in the first place. What better way to have someone steal my identity then to have all of it put on paper for who knows how long, sent over an unencrypted line, and copied on my side with no idea whether the person who sent it for me is going to be able to reproduce it.
So I finally get a hold of lancershop and amazingly I'm connected to the same rep who called me. She informs me that they need to do this to protect themselves. I'm not sure how doing a reverse lookup on an address through an obviously outdated system (I've gotten 2 pieces of junk mail for "Karen" in the last 2 years that I have lived there. A japanese man lived in my place for the 2 years before that) protects them at all, but the item was being shipped to the same address that it was being billed to. If my credit card company can confirm I live there, that should be all the protection they need to get their money from the credit card company if something goes wrong. I informed them of this, but she insisted it was necessary to ship my order. I said I would have to order from somewhere else since I wouldn't be able to provide that information, and wouldn't do it even if I could. She said "Ok, I'll refund your money and cancel the order". I hadn't seen this hit my credit card yet online, but I'm surprised they would charge before verifying they could deliver the part.
They call operator was very nice, but whoever is running this business is probably pouring money down the drain with whatever cracked up system they are using to reverse look up addresses.
I've heard mixed reviews of the shop, usually great or horrible.... but asking me to send that kind of information like that is out of the question if you ask me.
Now I guess its off to find another vendor that sells this. Anyone have any recommendations?
I guess I will not be ordering the Perrin unit from lancershop. I was interested in purchasing a few parts from this company, but just put in my order for the HFC today. After ordering this morning I get a call from an unkown number about 5 hours later looking for "Karen". I say they "must have the wrong number, have a good one" and the lady stops me asking if I'm Jon (I am). She says thats strange and confirms my address and says everything is ok.
Minutes later I get another call leaving a message. I go through lancershop's crazy callback system (that takes forever) because they are asking for a copy of my license, credit card, and some other information faxed over. If it was even possible for me to send a copy of the credit card (I used a virtual account number as I always do with online transactions to prevent identity theft) or a copy of my license (I live in an apartment, I've lived in 5 different places over the last 6 years and I'll probably be moving again in a couple of months... my address is correct with SOS but not on the license) let alone I don't know how I would even stuff those into a feed fax machine if I had access to one.....I wouldn't do it in the first place. What better way to have someone steal my identity then to have all of it put on paper for who knows how long, sent over an unencrypted line, and copied on my side with no idea whether the person who sent it for me is going to be able to reproduce it.
So I finally get a hold of lancershop and amazingly I'm connected to the same rep who called me. She informs me that they need to do this to protect themselves. I'm not sure how doing a reverse lookup on an address through an obviously outdated system (I've gotten 2 pieces of junk mail for "Karen" in the last 2 years that I have lived there. A japanese man lived in my place for the 2 years before that) protects them at all, but the item was being shipped to the same address that it was being billed to. If my credit card company can confirm I live there, that should be all the protection they need to get their money from the credit card company if something goes wrong. I informed them of this, but she insisted it was necessary to ship my order. I said I would have to order from somewhere else since I wouldn't be able to provide that information, and wouldn't do it even if I could. She said "Ok, I'll refund your money and cancel the order". I hadn't seen this hit my credit card yet online, but I'm surprised they would charge before verifying they could deliver the part.
They call operator was very nice, but whoever is running this business is probably pouring money down the drain with whatever cracked up system they are using to reverse look up addresses.
I've heard mixed reviews of the shop, usually great or horrible.... but asking me to send that kind of information like that is out of the question if you ask me.
Now I guess its off to find another vendor that sells this. Anyone have any recommendations?
I thought it was full 3" but there was speculation that it was as small as 2.5" at the two resonators. I couldn't decide between the RM01A and the Legalis R, but it seems like the legalis is quieter overall, but louder at idle/cruising speed (according to what fujitsubo info I can find/read) and the RM01A is lighter.
Hopefully I don't have to have AMS cut and weld a flange on the RM01A, but I guess we'll see. No idea why Fujitsubo wouldn't just fab that as 3", but I remember my Greddy evo II for my DSM had a second small 3-4" piece that was the neck-down. What a waste of metal
Hopefully I don't have to have AMS cut and weld a flange on the RM01A, but I guess we'll see. No idea why Fujitsubo wouldn't just fab that as 3", but I remember my Greddy evo II for my DSM had a second small 3-4" piece that was the neck-down. What a waste of metal
I still say you should hold out for the 100 cell if someone is still working on it...
For those of you wondering how the 100 cell stacks up to other ceramic HFC's, check dis out:
+22whp/+19tq on a Mustang Dyno. Ultimate HFC vs. 100 cell race cat.
http://www.norcalevo.net/index.php?o...2280#msg422280
+21whp/+11tq on a Mustang Dyno. VI$H you-know-who HFC vs. 100 cell race cat and Sun Hyper Force.
http://www.norcalevo.net/index.php?o...4330#msg424330
I am presently working to make this a bolt-on solution.
+22whp/+19tq on a Mustang Dyno. Ultimate HFC vs. 100 cell race cat.
http://www.norcalevo.net/index.php?o...2280#msg422280
+21whp/+11tq on a Mustang Dyno. VI$H you-know-who HFC vs. 100 cell race cat and Sun Hyper Force.
http://www.norcalevo.net/index.php?o...4330#msg424330
I am presently working to make this a bolt-on solution.
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... oh well. The really unfortunate thing is that I would rather leave the stock cat-back on than deal with something too loud. My DSM had an AMS setup to the cat-back, which was then a greddy evo II. One of the quietest, deep exhaust system, but in the early morning on the daily drive I just couldn't deal with it every day.I thought about using the stock mid-pipe and just having AMS weld a quiet muffler to fit, but hopefully the Fujitsubo will do me well. I guess we'll see. I'll throw up some pics of that for you guys also.
Such is the path of someone out of the norm I guess...
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EvoM Community Team
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Wow, I installed everything last night and I must say I'm very impressed with this system!
The setup now consists of:
Megan O2, Megan DP, Perrin HFC, and Fujitsubo RM01A Cat-back
The Perrin HFC had awesome gaskets with it, way better than any of the other exhaust gaskets I've received. They were slightly smaller than the full 3" ID, but a quick pass with the dremel fixes that. I also had to make a slight bend in the heatshield for the rear O2, but this position is much better than it banging up against the floorpan with the Megan RTP. Both of these are probably caused by the CEL eliminator I'm using (just in case).
The Fujitsubo I got did not neck down at the cat side. The flange was slightly smaller than the Perrin flange, but this exhaust is all about light weight with hollow hangars and everything, so I can see that. I have a pic of the inlet diameter just for posterity. The system did neck down a little bit at the resonators (I expected this from reading), but still looked to be much more free flowing and much lighter than the stocker. The stock midpipe actually wasn't very heavy, but the can weighed a TON. The only possible issue with fitment is that the first resonator comes very close to the driveshaft shield. When everything was bolted up straight it was very difficult to make it touch that shield, and after 40 miles of driving I haven't heard a peep from it.
I've got some video of my old setup, and I'll take some of the new one to splice together. All in all I'm really impressed by the fit and finish. Cruising/idle is like the last setup if not better (I didn't believe it myself) but when you get on it there is still a good bit of throat.
Thanks for the help guys!
Now I need to pick up a shield for my poor USDM bumper. Blast that JDM bumper for not fitting a crash bar!
The setup now consists of:
Megan O2, Megan DP, Perrin HFC, and Fujitsubo RM01A Cat-back
The Perrin HFC had awesome gaskets with it, way better than any of the other exhaust gaskets I've received. They were slightly smaller than the full 3" ID, but a quick pass with the dremel fixes that. I also had to make a slight bend in the heatshield for the rear O2, but this position is much better than it banging up against the floorpan with the Megan RTP. Both of these are probably caused by the CEL eliminator I'm using (just in case).
The Fujitsubo I got did not neck down at the cat side. The flange was slightly smaller than the Perrin flange, but this exhaust is all about light weight with hollow hangars and everything, so I can see that. I have a pic of the inlet diameter just for posterity. The system did neck down a little bit at the resonators (I expected this from reading), but still looked to be much more free flowing and much lighter than the stocker. The stock midpipe actually wasn't very heavy, but the can weighed a TON. The only possible issue with fitment is that the first resonator comes very close to the driveshaft shield. When everything was bolted up straight it was very difficult to make it touch that shield, and after 40 miles of driving I haven't heard a peep from it.
I've got some video of my old setup, and I'll take some of the new one to splice together. All in all I'm really impressed by the fit and finish. Cruising/idle is like the last setup if not better (I didn't believe it myself) but when you get on it there is still a good bit of throat.
Thanks for the help guys!
Now I need to pick up a shield for my poor USDM bumper. Blast that JDM bumper for not fitting a crash bar!
Last edited by fostytou; Jan 29, 2008 at 10:09 AM.