Hey, we just recently added an HPD pipe/silencer and clutch kit to our Sport400L. (98'). Man, the sound difference is awesome, its not "TO" loud but it sounds ALOT better than stock. Performance wise, the combonation of the 3 mods works well togeather. Our sport is geared a little high (for top speed), and we can easly hike up the front end anywhere from 0-10mph. It use to only hike up on concrete, but now it can almost anywhere. The only thing that i dont really like about it is that because of the automatic transmission, when you push the trottle just a tad, to go slow, the powerband hits early and pulls alot harder than stock. so watch it going up steep hills that you Dont want to "FLY" up. But in a drag race, the power hits and just keeps pulling hard, unlike the stock sport. The stock sport tends to fade in power, instead with the mods i received, it just keeps pulling until it cannot pull anymore. She Throws alot more roost to . I just thought i would share that with you guys, hope i helped somone.

THe pipe and silencer are TRAIL versions

 

That's pretty much what i noticed with my RCR kit.

Did you rejet your carb? And do the a Air-box mod?

This is on a trailblazer right?

Glad you are happy with your mods.

 

Add Delta V-Force reeds and a Uni-Filter and see what you get.

 

too bad Trailblazers DON'T HAVE REEDS

 

He said it was a 400L

Bruce L. Hall
99 Sport 400L