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PERRIN Thermal Blanket Downpipe ( Part Number:PER1 PSP-EXT-015)

PERRIN Thermal Blanket Downpipe

Part #: PER1 PSP-EXT-015
MSRP: This Item is no longer available.



Color: Black
Installation Hardware Included: Yes

Mfgr. Warranty: 5 Years
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
RallySport Guarantee


RallySport Direct carries a wide selection of excellent aftermarket performance products brought to you by PERRIN Performance.

On this page, you are looking at the PERRIN Performance Thermal Blanket made specifically to fit your Downpipe. This is a great way to help contain the heat created by the downpipe to help reduce underhood temperatures.

Here are the details:

  • Fits on the downpipe
  • Thermal losses from exhaust components will cool the exhaust
  • Improves power and protects vital under hood components from heat damage
  • Designed to keep radiant heat away from the intercooler and intake
  • 3-Layer construction
  • Outer cover made from Silicone Impregnated Fiberglass rated to 500°F
  • Inner layer made of Calcium Magnesium Silicate Insulation rated to 2000°F and Silica rated to 1800°F
  • Stainless steel rivets are mounted to the blanket 
  • Stainless steel wire is supplied to secure the blanket to the downpipe
  • Fits stock downpipes and PERRIN downpipes and most aftermarket downpipes
  • Black finish


Verified Purchase

Works as intended
Cornbread 7 months ago
TLDR; Good quality, watch for clearance around the cat if it covers it. Bought this to go over the Invidia Catted Downpipe. I have the pipe with the extra bung for another O2 sensor, and this covers that obviously, so beware of that. Another thing to note, with the catalytic converter being where it is on the pipe, fitment is a little bit of a hassle. I couldn't get the blanket all the way around it, however I got really close. I'm sure with a bit extra elbow grease you can make it happen. Keeps things rather cool, although I haven't yet tested this in the summer, but the engine bay is staying much cooler in general even for winter. I feel like the price is a bit steep for this but since it's one of the only blankets for downpipes on the market you cant really do much about that.


Keep the heat where it's supposed to be
MikeG 8 months ago
I installed this with a Cobb bellmouth downpipe to cut down on the heat reaching the intercooler, firewall and CV boot. None of these are places you really want to be pumping heat into. Easy install from underneath the car. It does rub a bit on the firewall with this downpipe but doesn't touch anything else. A little on the pricey side, but being able to easily remove it means if I ever need to swap downpipes I'll be in better shape.

Crossing fingers!!
DSC4WRX 4 years ago
I bought this for the purpose of protecting my CV Boot from being burned up by the cat on my Invidia catted DP. The Dp was already installed so it took me a little while to figure out how to wire up the blanket. Once I figured it out though, it wasn't too difficult. I ran out of wire so I could not get to the last ring (wired from top to bottom); had to stop at the second to last ring. Also, the blanket doesn't completely cover the cat so a bit of the cat is still exposed near the CV boot. The blanket is staying on though; so I hope all goes well.
Verified Purchase

E85STI 4 years ago
super easy to install even with the downpipe on the car. It really helps reduce heat in the bay Also, works well with a turbo & uppipe blanket
Verified Purchase

Perrin Downpipe Thermal Blanket
1fastwgn52004 4 years ago
Very easy to install. Took about 10 mins. I actually bought this not for its intended purpose, but to keep the heat from the downpipe away from the CV boot. I had to replace 2 boots in 3 years and determined it was because of the heat from my Cobb downpipe. Hard to tell if it did anything to improve performance. Nothing significant, anyway.

  • Q: Over a Cat  Cornbread 7 months ago


    I was planning on putting this over a Invidia catted downpipe and it would sit over the cat. Would this affect the cat in any way (cause it to overheat, damage it, etc...)?

    • A: We have not heard of any overheating issues when running this blanket.

      Luis L. 7 months ago
  • Q: Perring dp blanket  singhjaskar89840 4 years ago


    Can this be wrapped about the dp while the dp is still on the car?

    • A: You can install it while on the car, just will be harder. Much easier if it wasn't on the car.

      Kyle A. 4 years ago
  • Q: 4 TurboXS DP  micTX 4 years ago


    will this fit the TurboXS 4 downpipe?

    • A: We can't confirm fitment for all downpipes. but from previous findings and experience you shouldn't have any issues with it.

      Kyle A. 4 years ago
  • Q: fitment with invidia dp  Askoor STI 4 years ago


    Will this fit with invidia catless dp?

    • A: This will fit with your Invidia Dp.

      Kyle A. 4 years ago
  • Q: Fitment  BaranSti13 5 years ago


    Anyone have pics installed on an invidia cattless down pipe? Anyone done modification for the extra o2 bung? Thanks.

    • A: We unfortunately do not have any pictures of this blanket installed on an Invidia catless downpipe at this time and we have not tried to trim one for an extra O2 bung.

      Zach G. 5 years ago