2005 Lotus Elise
"I got my Railer yesterday, it installed like the stock dif and had it on in about 10 mins. I have my Ohlin's set fairly soft due to the back roads that I run on. I can feel the car being sucked down at around 90 mph. I normally only go to 120+ on nice roads, but I thought I would try it and got up to 129 on a bouncey back road with complete confidence compared to without it." - Darrin, Piqua OH.
2010 Lotus Evora
"So wrecking the car ended up being not too bad of a deal afterall. Glenn from Difflow offered fabricate a new one for me and look what he came up with!! I still have to replace the diffuser finisher, but wow it looks awesome! The build quality is top notch and the whole thing is very light. I don't have a good "before" pic for comparison, but this looks just right for the Evora! Maybe if I would have had this in the car prior to my accident the added downforce would have kept me on the pavement " - Todd, Wexford PA.
2006 Lotus Exige Cup 255
"Just mounted my railer 5 element diffuser to my cup car today. It looks great and the fit was perfect. The overall diffuser is much stiffer and more stable when mounted. Ran the diffuser at the track this weekend and really liked it. It seemed to improve high speed stability and made the car feel more hunkered down. It certainly drew a lot of comments." - Ed, Newark DE

View: Lotus Elise/Exige/Evora | Acura NSX | Nissan GTR

Frequently Asked Questions
1) What is a diffuser and how does a Difflow diffuser work?
Check out our video demonstration to see how our diffusers work.
2) Will a Difflow diffuser fit on my Lotus?
We carry diffusers that fit on these car models:

2005 Lotus Elise
2006 Lotus Elise
2007 Lotus Elise + SC
2008 Lotus Elise + SC
2009 Lotus Elise + SC + Purist
2010 Lotus Elise + SC
2011 Lotus Elise (WILL NOT FIT)

2006 Lotus Exige
2007 Lotus Exige S + 255 Cup Car
2008 Lotus Exige S240
2009 Lotus Exige S260
2010 Lotus Exige S240
2011 Lotus Exige S260

2010 Lotus Evora + Sport
2011 Lotus Evora + Sport (Non-Supercharged Only)

For full compatibility, view our products page to see if the diffuser you want will fit.

Our diffusers are a direct OEM replacement - no drilling, cutting or modifying anything on the car.

Our diffusers work with the stock rear panel/grills on your Elise/Exige/211. They also work with all of the rear panel eliminators on the market. Our diffusers do NOT work with the Jim Clayton Jack Helper. If you want a diffuser that does work with the Jim Clayton Jack Helper, let us know and we can shorten the fins down from front to back for you for a small additional fee.
3) Do you make diffusers with an exhaust hole cut-out?
All of our 3 and 5 element diffusers have the option to have an exhaust hole cut-out. Our 7 element diffusers fins don't allow room for an exhaust hole cutout. We can make you a diffuser that has no exhaust hole cut-out if you have an exhaust that exits on the top of the diffuser. We also carry exhaust hole cover plates to bolt on over your existing exhaust hole cut-out if you upgrade to a new exhaust. When purchasing a diffuser from our website, you have the option to select YES or NO for an exhaust hole cut-out. Our exhaust hole cutouts are large enough to accommodate the stock exhaust tips and supercharged exhaust tips. The Stage II cutout is roughly 8 inches wide - and that's the width of our exhaust hole cutout.
4) What diffuser is right for me?
It all depends on what you want your car to look like and how you want it to perform. All of our diffusers provide a substantial amount of improvement over the stock OEM diffuser on your car. If you are a casual driver that doesn't track or race your car, then we would recommend the Original or Railer Jr depending on your taste. If you do track your car, we would recommend the Railer for it's longer fins, and longer body.
5) Will the diffuser scrape on the ground over bumps/hills?
Here are the clearance measurements for our diffusers on stock suspension. (aprox).

Lotus Elise, Exige
3 Element Original - 5 Inches off ground, parallel to surface.
5 Element Original - 5 Inches off ground, parallel to surface.
7 Element Original - 5 Inches off ground, parallel to surface.

5 Element Railer Jr - 5 Inches off ground, parallel to surface.
7 Element Railer Jr - 5 Inches off ground, parallel to surface.

5 Element Railer - 4 Inches off ground, parallel to surface.
7 Element Railer - 4 Inches off ground, parallel to surface.

Lotus Evora
7 Element - Same height as the rest of the car.

*Different suspension, tire pressure and ground surfaces will change the measurements slightly.

If the front end of your Lotus clears an incline, then the back end will clear it too. Our diffusers are very durable and can handle bad curb rash and hard hits. Be cautious and take inclines at angles.
6) How difficult is it to install the diffuser?
It's very simple installing our diffusers on your car. Simply unbolt your current diffuser. Save the nuts and bolts because you will be using them again to install your new Difflow diffuser. Bolt on your new Difflow diffuser and you're done. Our diffusers are a direct OEM replacement - which means you don't have to drill, cut or modify anything on your car. The overall process takes about 30 minutes with a socket wrench.
6) Do you provide instructions and hardware to install the diffuser?
Yes. Instructions are included. There is no hardware included - because you will use the same hardware that your stock diffuser used to install the Difflow diffuser. That means, save every washer, but and bolt from the uninstallation of your stock/other diffuser.

Elise / Exige Diffuser Installation Instructions (PDF) (Video)
Elise / Exige Aero Plate Installation Instructions (Video)
Elise / Exige Exhaust Hole Cover Plate Installation Instructions (PDF)
Evora Diffuser Installation Instructions (PDF) (Video)
7) Do you provide the rubber edging that was originally on my stock diffuser?
Our diffusers do not come with the same rubber edging that the factory put on your stock diffuser. It interrupts the airflow of the car. If you are interested in putting rubber edging on your Difflow diffuser, you certainly can. Some of our customers use ''door edge guard'' or ''door edge trim.'' You can buy it at any autoparts store and simply put it on the fins/body of your Difflow diffuser. You may want to use some black silicone to hold it in place. Here is an example.
8) How long does it take to receive my diffuser after I order it?
After we receive payment, we ship our diffusers within 48 hours. If we are out of stock, you will be notified and given a time frame for when your diffuser will be complete. It generally takes 2 weeks for a diffuser to be completed. All diffusers are shipped Fedex Ground. If you need the diffuser faster, let us know and we can arrange to ship the diffuser by Air.
If you have any more questions, please contact us and ask.