Big Thunder Performance has the ultimate modification for your new Skidoo XP 800 R or Summit 800 R snowmobile. The stock air box is very restrictive leaving potential power on the table. Bondi Engines has developed a direct bolt on replacement air box that produces an increase of 8-12hp on stock motors with no jetting changes from the stock set up.

The new Bondi air box installs with no modifications to the cosmetics, or appearance of the snowmobile. The Bondi air box slides directly onto stock carburetor flange and adapts to the front air box.

The Bondi air box is a must have item as everyone knows the air box is holding back the 800 R engine especially after any modification to the engine or the exhaust system.

Price $290


Contact Big Thunder Performance for your air box today.

Tod - 517-230-3732
Dave - 616-299-6590

We will start shipping these next week.

Could you post a pick of the air box on a sled?

Are you kidding? I find nothing restrictive about the air-box, one of the most sano ones i have seen and where are the restrictions you claim? 8-12 HP just by swapping the box that has no restrictions in it. You my friend are F.O.S. !

I'm also extremely skeptical thats an insane amount of horsepower for replacing a part that does not look restrictive at all

Then DON't buy it... it's as easy as that..

yea i picked up 25 hp on dyno

Are there intake sensor mounts? I'd call and purchase one but if my sled goes on the dyno next week we'll know for sure about the hp. If you're wrong, might as well hang it up cause I'd post the dyno sheets on Dootalk. If your right then kudos to you and much praise would be posted.

Seems to good to be true. The price seems a little steep, lets see some dyno sheets!!!!!!!!!!!!!!!!!!!!

how bout the things from bikeman that look like cats bullseyes,, or even the bullseyes,, that just pop in for 30 bucks

When has Bondi or Big Thunder ever peddled shit?

Both are well respected shops, if you want to go fast good places to spend your money. If you just want to talk shit then you're in the right place.

the one thing that stikes me as " odd" is ... it replaces so called restrictive air box. the benefit I am assuming is more air flow. yet the add says '' no jetting changes". how can you add 8-12 hp without adding fuel??? the only way that makes sense is if you start with a pig rich sled and the added air flow cleans it up. if you start with a sled with spot on air/ful ratio and add a bunch of air, you will need added fuel to keep the a/f ratio correct. power is extracted from fuel, not air.

Here are the facts from bondi check it out for your selves
Click here!

went to the site, and it says that it gains 8-12 hp. so it must be true.......

Why don't they do a independant test ona dyno with air flow meter. This will be the only way to back this claim up????12 hp is this like the bikeman magic pipe that made 250 hp, and that turned out be a joke too.

There is HP to be gained in the airbox, I don't remember what was picked up at Dynotech but it was a noteworthy gain.

Chris.

post dyno sheets. then i'll buy one.

$290 for 8-12 hp is too steep of a price - you're joking right????????????????

That would be the absolute bargain of the year if it actually pumps out even the lower 8 hp!

How many people fall into the trap of paying close to $300 for v-force reeds that MIGHT get you 2-3hp!?!?! (key word-might)

Independent dyno sheets would be great!!

This air box works..... Its simple as that.

We wont sell a part unless it makes power......

We have been testing this sled for months now as we had one of the first 500 built. We have other mods that will bring this sled alive compared to the stock setup from the factory. If your skeptical of the performance gain dont buy one, if you want the most out of your new XP then we can help. This is a quality product no junk.......

All your sensors plug into the same spot so there will be no ill effects from the addidtion of this product.

We are in this business to help everyone build as much power as possible not scam people.........

Call or PM if you have any questions....

Have a great time on the snow and be safe......

I am a little suprised at your answer. you have to understand, people are going to be sceptical of " simple" bolt ons that give huge power gains. you do have a great reputation. but I still dont see how you gain aprox 10 hp by adding air. as I asked earlier, if the jetting is right on the money, good a/f #'s, good plug color. how can you get 8-12 hp by adding air without adding fuel? seems to me if the a/f ratio is where you want it and you add a bunch more air. you need to add a similar amount of fuel to keep the ratio the same.
I am not tying too be an ass, but to tell potential customers " If your skeptical of the performance gain dont buy one" dosent help.
if you would explain how you made the gains without adding fuel I ( and others) could get a better understanding of the product.

$290 for a gutted airbox.......you're joking right????

It looks like the inlet is a larger diameter than stock, the rest looks the same. How much for just the inlet hose with sensor port? I can take it from there.

Is it possible that the jetting from the Factory is so fat that buy doing this Mod it actually evens a/f mixture to produce more hp.If I owned one hopefully in the future I would do it myself.Just my .02

Took my 08 Doo 800 down to 460 mains and its still fat...... stock jetting is not spot on for good fuel. (92 octane no ethanol or additives IMO )
Making a trip to the Dyno to verify my findings soon and would like to bring one of these air boxes.
Hope they can deliver one this week.
Might not need to add fuel if this info is correct and 8 HP wouldnt be that far out of line.
Design looks good.....engine needs air to make HP. Very true.
If its the real deal cheap HP per Dollar.
Spent $300.00+ for reeds for less than 2 HP...... now thats painful.

that is my point exactly. if the jetting is pig rich to start with. then yes, if you add air with a better air intake, you will lean the mixture and get power gains. you can also see the same gains by jetting leaner to the correct a/f ratio.... jets are 4 bucks a piece.
will be intersting to see your results

baseline. stock jets/stock intake
jetted to " trailsafe" a/f ratio with stock intake
jetted to " trailsafe" a/f ratio with mod intake

Its not a question of dont buy it and f-u if you dont care. All we are is asking for a independent test with a air flow meter on the dyno. If you have been running these as long as you say that you have???? Then why don't you have this already tested and done for nay sayers like us. 12 hp is a stretch with stock jetting and changing only the air box. With straight k@n filters we have never seen that. Oh ya with K@n filters and dropping 6 jet sizes anything is possible.

you'll still get more power by increasing airflow rather than decreasing fuel.

that is very true to a point......IF the a/f ratio is spot on, and the intake flows more air. it will allow you to jet up( for the added air) to acheive the same a/f ratio, and make more power. but in the post it said " no jetting". if the post said" this thing flows so much more air that we had to go up 10 jet size to compensate for the added air volume" I might understand.
looks to me that if you can gain 8-12 hp by leaning the mixture. it was rich as hell to start. if you jet down to the same a/f ratio your gains might only be 6-10 hp, but jets are 8 bucks intake is 300 bucks

Does this product give 8-12hp in the peak?, or is 8-12 somewhere in the powerband?, or is it based on a gain on dyno numbers that may be lower than brp stated the sled to have. Like 155 ish with this mod total.
I'm just throwing out there a possible rumor I heard.

I purchased one today to try so we will see, but you guys are killing me. How many of you bought vforce reeds raise your hands. How many have bought after market heads for 4-6 hp, raise your hands. I have yet to see any dyno sheets for the heads. Every Skidoo I have ever owned has been jetted rich from the factory, and thats ok. If you want true performance from a 2 stroke you need the right air fuel mixture and great clutching and you beat modded sleds. These guys have found the gains done testing and developed and marketed the product not to mention their reputation is great and on the line when they bring a claim like this and for what for someone to say I can do the same thing for $8 bucks. Where do you guys work? What do you do for a living. Can we teach a 16 year old kid to do your job for half the money? Probably, you have to remember these guys are bring this to you with their name on it. I believe there is decent gain to be had here and until you can prove otherwise lets not bash remember this is how they make their living. I do think it is great to ask how they are doing or for dyno #'s lets keep it positive

i'm seriously considering buyng one too. let us know how it works!!!

niksrik7, Again...the 800R is jetted FAT to begin with !!

And this is more than just the larger connecting tube, the whole box has increased volume because the restriction AFTER the tube has been eliminated too (it intruded 1/2 of the opening) so just changing the tube will not fix the poor flow.

I'd say BIG THUNDER is an independent tester as some of you demand, Bondi is the one who makes the box. BTP did post a dyno sheet on DOO~Talk showing 150 HP....up from 142 (not shown).

...but nobody has to buy one if you don't believe right ? I'd be more interested in actual field testing like MPH or E.T gain in a 1000 ft run, dyno #'s mean squat out on the snow.

Agreed there is nothing that beats real world, like having rpm's increase 400-500

...and with that RPM increase, anyone who knows (some others have no clue) you can then add a pretty good amount to the pin weight and you'll go much faster.

Yea, have to agree that jetting down may account for a majority chunk of claimed HP.
A full dyno report would prove or disprove this.

dude.. take a chill pill. its your 300 bucks, put em in a pile and burn em for all I care. and I am not bashing. I asked a simple question " were the gains made after jetting was corrected" if not, then similar gains can be made just by leaning out the mixture with jets. you guys seem to be answering my question " every skidoo I have ever owned has been jetted rich from the factory". so spend 300 bucks to correct you rich jetting,its your money. tell you what, find a buddy that runs the same as your sled. run em together with the mod intake and stock jetting. then jet down 3-4 jets and run him with the stock box rejetted. let us know how much difference there is. and again I never bashed them. I said they had a good reputation, but I was sceptical about gains that large without adding fuel. and I would like to know more about how they achieved those numbers. the answer was if you are sceptical dont buy it ... that makes me more sceptical

they cant be an independent tester if they have 50 intakes sitting on their shelve they are trying to sell....right

I agree.completely about field testing. dyno's can be manipulated

I guess you have a point there, they want to sell sell sell. I also wonder how much of that gain is from "proper" jetting

Seems there have been a few buyers and there is a restriction in the stock box so we'll see how this BOX works in the next few weeks, the best thing is not needing to tamper with it in the first place, I don't like the idea of free-ing up power that should be there already.

I bet the trend is going to be more towards little mods that give you big hp since the epa and sound regs choke up the sleds from the factory.

The XRS600 has a similar designed air box so I feel there is something to be gained here, how much? who knows time will tell. I have done pipes and heads and reeds and spacers on my other sleds so I felt why not try this to. Half the fun is getting the machine dialed in. Remember BRP makes these things so they run in all conditions and stay EPA compliant. There always going to be those who tune to improve stock, look at clutching it makes a world of diffence so why doesn't BRP send it stock that way?BRP has to make these things perform at different elavation levels and climate conditions.

The sled gained 300 rpm on the snow had to take the clucth down to clicker 1 and still pulls a little high on rpm. We will have a killer clutch kit available soon as well. Preliminary testing is showing this sled is giving our F1000 and Mach Z fits.........

Side by side on the snow an XP with a air box mod is much faster all the way through than just a stocker. Just jetting down has not gained the same results.

Boxes are now available on the web site......

great news!! i dont know why people are giving you such a hard time. it's not like you guys have been known to peddle crap.

going to dynotech monday with my 800r- would be neat to try one on back to back dyno runs??

Ever notice what happens to a chain saw when you are cutting threw a 3 foot log with a chain saw at full song and it runs out of gas?
How about being at Unadilla when they had the U.S.G.P. there and being amazed at how crisp those two strokes sounded compared to your fat rich oil spewing bike, but they had new rings and pistons istalled after every race.
.

no.

Always had enough foresight to fill the tank before a cut of that size,nope never been a problem.
And comparing the XP to a GP bike is a stretch, the XP's are cool but come on maybe a lttle overrated there.
($10,000 sled/ $100,000 + bike????? Your giving Ski-Doo a lot of credit there)
When in doubt add EGT's, Addition of any Hot Rod parts, this should be a standard if your not a gambler.
Its all just kicks...... Relax

Keep us posted...interesting to see if this works...would be nice.