G,day gents,
I solely embrace democracy and i fully support healthy debates such as this thread.
As with all information on any subject matter it must be support by solid evidence/facts
or sound theories. Thats what helps us to chose what ever product that we feel is right for our particular need. When i became a part of this thread, i wanted to know which exhaust system was best for my D40 Navara, this has brought Northside and Unichip into the debate which is fantastic for all.
After following this debate over the last week, i then contacted 6 top exhaust specialists for there advise, 3 replied and i have not heard from the other 3. However, please read their comments to my enquiries below.
Regards, RLI
G,day Gents,
I am seeking advice regarding upgrading my standard exhaust system to a either 3inch or 2.75inch mandrel bend system.
I have a Spanish built 2005 Nissan Navara D40, manual 2.5lt diesel turbo dual-cab ute.
I have been seeking advice on various 4x4 websites to which exhaust system to put on my D40. It seems that every one has a different opinion.
So far I have been told:
1. 3.0 inch mandrel bent including dump pipe and high flow muffler is the way to go.
2. 2.75 inch mandrel bent including dump pipe, high flow cat and high flow muffler is the
way to go.
3. Either a 3inch or 2.75inch straight through system is the way to go
4. 2.5 inch including hand made dump pipe and mandrel bent pipe is the way to go.
5. Another person states that you cannot replace the dump pipe because the cat is in there.
I am confused as hell, please help!
It appears that the majority of people advise either a 2.75inch mandrel bend exhaust system or a 3inch which do you recommend and what are your reasons?
I await your reponses.
Kind regards,
RLI
(1.)
Hi There RLI,
Thank you for your enquiry.
We recommend that you have a good quality air filter & snorkel fitted to your vehicle first as this will help bring more air into your engine helping keep it cooler & giving you better performance from your vehicle, then your exhaust & chip fitted.
If you are unable to have the exhaust & chip fitted at the same time we suggest you have the exhaust fitted first as it reduces your exhaust gas temperature where as if you fit the chip first you will find that it will raise your exhaust gas temperature.
It doesn’t matter whether the vehicle is a 2.5L Pathfinder or a 4.5L V8 Land cruiser Ute our Turbo Diesel Exhaust Systems are a 3” Mandrel Bent. The reason we use a 3" system is that it provides us with biggest possible EGT (Exhaust Gas Temperature) drop. We then use an aftermarket Chip/ Module & put the fuel back in, where we then bring it back to the factory EGT’s by doing this we find the best power gains which can lead to better economy.
We also recommend that if you are doing beach work or are in & out of salt water then you go for the stainless steel system as this is more suitable for these environments.
Also please be aware that our systems are not like any other system on the market. The Taipan XP is a far more superior product as it comes with the vortex muffler. The Vortex Muffler system helps provide more power & give better performance than that of the conventional muffler system as it helps draw & push the exhaust gas out giving you a lower EGT. Our systems are also aluminized & where dump pipes are applicable ceramic coated. Our stainless steel systems are manufacture from 304 grade stainless steel.
I understand your confusion please rest assure that all information that I have provided you is correct, we have over 30 years experience in the exhaust industry. If I can be of any further assistance please do not hesitate to contact me.
Kind Regards
Taipan XP 4WD Diesel Performance Exhaust Upgrades - Australian Owned - Performance that Bites
(2.)
Hello RLI, it’s pretty confusing on these forums. I cannot believe a lot of what is said.
1. We only make 2 ¾” dump and system for this vehicle. We can bend from 1 ½” to 5” but have found 2 ¾” is the optimum size
2. We recommend running a cat also. It is hi flow and offers no restriction. The muffler we use is also hi flow. You can roll a golf ball from one end to the other.
3. By Straight through I am assuming you mean no muffler. This option is fine when stop and starting around town but believe me at 100 k an hour you or your partner will want to be climbing out of the truck. Extremely drony and as I said with our muffler no restriction no advantage leaving it out.
4. Our 2 ¾” dump is hand made.
5. The cat isn’t in the dump but is part of the dump and cat pipe.
6. The reason we use 2 ¾” is because 3” will over exhaust and can and does cause boost spike sending the vehicle into limp home mode. A number of manufacturers who use 3” restrict the system back in the muffler.
We make a 2 3/4” mandrel bent system with hi-flow converter and dump pipe to suit your 2.5ltr D40 Factory Turbo Navara. We require the build date and series of the Navara.
These exhaust systems are all bent and built in our own workshop with our automatic mandrel tube benders, by our highly experienced, qualified staff. All kits come with nuts, bolts and gaskets supplied (apart from gasket off the back of the turbo-which is quite alright to use again) and fit on to all original mountings and brackets. We supply a hi-flow, perforated straight through type muffler. This means that the muffler won't restrict the flow of the system due to it being the same size diameter as the tube and the system won't be any louder then standard as the perforations absorb any excessive noise or droning.
Our customers have given us good feedback, being extremely happy with the improved torque and fuel economy of their vehicles after installing one of our systems. We have found that we sell a lot of our product to people towing large vans and boats looking for more power to get them up hills and along passing lanes. On average our systems give customers an approximate power increase of up to 15% and an improvement to fuel economy by approximately 12%.
The price for an aluminised mild steel system is $1185.00 plus $25.00 for packaging, plus freight.
The price for a stainless steel system is $2000.00, plus $25.00 for packaging, plus freight.
Alternatively we can fit it here in our workshop for an extra $300.00.
* Please note fitting costs may vary depending on series of vehicle.
Thanks for your enquiry. I hope to hear from you again soon.
Regards
Noel
(3.)
RLI,
Please call the phone number below and we can discuss..
Best Regards,
Jeremy Mcalpin
Program Manager,
Sterling Performance Exhaust’s & Chips.
Phone: +61 (2) 1300 992 195 Fax: +61 (2) 6578 8690
Sterling 4x4 Performance Exhaust: High Performance Exhaust Systems & Kits SPT