diff --git a/args.go b/args.go
index 90cca52..24916f8 100644
--- a/args.go
+++ b/args.go
@@ -41,6 +41,8 @@ func (s saveStatusArgs) Includes(search int) bool {
 }
 
 type config struct {
+	trackerLink    string
+	saveHeader     string
 	body           string
 	concurrency    int
 	delay          int
@@ -61,6 +63,10 @@ type config struct {
 
 func processArgs() config {
 
+	// tracker link params
+	trackerLink := ""
+	flag.StringVar(&trackerLink, "tracker", "", "")
+
 	// body param
 	body := ""
 	flag.StringVar(&body, "body", "", "")
@@ -96,6 +102,11 @@ func processArgs() config {
 	flag.Var(&saveStatus, "savestatus", "")
 	flag.Var(&saveStatus, "s", "")
 
+	// saveheader parms
+	saveHeader := ""
+	flag.StringVar(&saveHeader, "saveheader", "", "")
+	flag.StringVar(&saveHeader, "sh", "", "")
+
 	// timeout param
 	timeout := 10000
 	flag.IntVar(&timeout, "timeout", 10000, "")
@@ -142,6 +153,8 @@ func processArgs() config {
 	}
 
 	return config{
+		trackerLink:    trackerLink,
+		saveHeader:     saveHeader,
 		body:           body,
 		concurrency:    concurrency,
 		delay:          delay,
@@ -177,6 +190,8 @@ func init() {
 		h += "  -t, --timeout <millis>     Set the HTTP timeout (default: 10000)\n"
 		h += "  -v, --verbose              Verbose mode\n"
 		h += "  -X, --method <method>      HTTP method (default: GET)\n\n"
+		h += "  -tracker <tracker link>    Replaces {tracker} in paths with the specified tracker link\n"
+		h += "  -sh --saveheader <header>  Save only responses containing a specific header\n"
 
 		h += "Defaults:\n"
 		h += "  pathsFile: ./paths\n"
diff --git a/main.go b/main.go
index f2a73a2..1188f0f 100644
--- a/main.go
+++ b/main.go
@@ -8,6 +8,7 @@ import (
 	"path/filepath"
 	"sync"
 	"time"
+	"strings"
 )
 
 const (
@@ -88,6 +89,10 @@ func main() {
 				continue
 			}
 
+			if c.saveHeader != "" && !res.hasHeader(c.saveHeader) {
+				continue
+			}
+
 			if res.err != nil {
 				fmt.Fprintf(os.Stderr, "request failed: %s\n", res.err)
 				continue
@@ -115,10 +120,16 @@ func main() {
 			// so we should strip that off and add it to
 			// the beginning of the path.
 			u, err := url.Parse(host)
+
 			if err != nil {
 				fmt.Fprintf(os.Stderr, "failed to parse host: %s\n", err)
 				continue
 			}
+
+			if len(c.trackerLink) > 0 {
+				path = replaceTracker(path, u.Host, c.trackerLink)
+			}
+
 			prefixedPath := u.Path + path
 			u.Path = ""
 
@@ -136,7 +147,7 @@ func main() {
 				timeout:        time.Duration(c.timeout * 1000000),
 			}
 		}
-	}
+	} 
 
 	// once all of the requests have been sent we can
 	// close the requests channel
@@ -169,6 +180,19 @@ func readLines(filename string) ([]string, error) {
 	return lines, sc.Err()
 }
 
+func replaceTracker(path string, host string, trackerLink string) string {
+	now := time.Now()
+	seconds := now.Unix()
+
+	host = strings.Split(host, ":")[0]
+
+	tracker := fmt.Sprintf("%d.%s.%s", seconds, host, trackerLink)
+
+	newPath := strings.Replace(path, "{tracker}", tracker, -1)
+
+	return newPath
+}
+
 // readLinesOrLiteral tries to read lines from a file, returning
 // the arg in a string slice if the file doesn't exist, unless
 // the arg matches its default value
diff --git a/response.go b/response.go
index 1ca0d0a..e3f94cd 100644
--- a/response.go
+++ b/response.go
@@ -7,6 +7,7 @@ import (
 	"io/ioutil"
 	"os"
 	"path"
+	"strings"
 )
 
 // a response is a wrapper around an HTTP response;
@@ -89,3 +90,12 @@ func (r response) save(pathPrefix string, noHeaders bool) (string, error) {
 
 	return p, nil
 }
+
+func (r response) hasHeader(header string) bool {
+	for _, item := range r.headers {
+		if strings.TrimSpace(item) == header {
+			return true
+		}
+	}
+	return false
+}